Chapter 1: The World That Vanished
Warm morning sunlight poured through the windows of the small wooden house, carrying the comforting aroma of freshly baked bread.
Seven-year-old Kairo rubbed his sleepy eyes, his messy black hair sticking out in every direction.
"Kairo, breakfast is ready!" his mother's cheerful voice rang from the kitchen.
"Coming!" he called back. His small feet pattered across the wooden floor as he hurried to the table.
His father was already seated, sipping tea with a gentle smile. His older sister teased him for looking half-asleep, while his little brother tugged insistently at his sleeve, giggling.
It was... happiness. Pure, ordinary, everyday happiness.
Kairo thought to himself: If life could stay like this forever, I'd be completely fine.
But in the very next instant—
The world shattered.
A blinding light swallowed everything. The warmth of his family's voices disappeared. Kairo's small hand stretched out desperately into nothingness.
"Mom...? Dad...?" His voice quivered, barely a whisper.
When the light finally receded, Kairo stood alone in the heart of a vast, unfamiliar forest. Strange, glowing butterflies floated lazily through the air. The sky above shimmered strangely—two suns hung there. One in the distance looked pitch-black, like a void devouring light itself; the one closer shone beautifully, warm and golden.
Drawn instinctively to the gentle glow, Kairo took a hesitant step toward the brighter sun. The dark one flickered once... then vanished completely, as if it had never existed.
His tiny heart hammered against his ribs.
"This... isn't my home..." Tears welled up, spilling hot down his cheeks. "Where am I...? I want to go home... Mom, Dad, where are you? Why am I in a forest? I was just at home!"
His small voice cracked on the last word, dissolving into quiet sobs that echoed unanswered among the towering trees.
The glowing butterflies drifted closer, almost curious, but offered no comfort.
Kairo stood frozen, clutching the front of his shirt, the world he knew gone forever in a single cruel flash of light.
Kairo stumbled forward, small sandals crunching over roots and fallen leaves in the endless forest.
"...Where am I...? Why am I here...?" His voice cracked, thin and fragile. The only answer was the indifferent rustle of wind through the canopy.
Hours blurred together. His legs—tiny, already unsteady for a seven-year-old—trembled with every step. His throat burned with thirst, his stomach twisted in sharp hunger pangs, and fear coiled tighter around his chest like a living shadow, growing heavier with each breath.
Just when he was certain he couldn't take one more step—
He saw it.
Through the thinning line of trees, a breathtaking sight rose before him: towering white-stone walls that seemed to pierce the sky, crowned with elegant spires. Colorful banners snapped proudly in the breeze, their vivid hues almost too bright against the muted greens of the forest.
Kairo blinked rapidly, once, twice, half-convinced the vision would dissolve like a mirage.
"A... city...?" His dry lips barely moved. "Maybe... maybe someone there can help me!"
A fragile spark of hope flared in his exhausted body. Ignoring the scream of his aching muscles, he lurched forward toward the massive gates. Two armored figures stood sentinel on either side—enormous, easily twice his height even from this distance.
He opened his mouth to call out.
But the world suddenly swayed.
His vision smeared at the edges, colors bleeding together. The ground rushed up to meet him.
"Oi! A kid—?!"
One of the guards' deep voices cut through the haze, sharp with surprise.
Kairo's small body hit the earth with a soft thud. Darkness rushed in from every side.
"Quick—get him inside! Call the medics!" the second guard barked, boots already pounding as he dropped to one knee and scooped the limp child into his massive arms.
The last things Kairo registered before everything faded were the rhythmic clank of plate armor, the urgent snap of orders, and the faint, metallic scent of steel and sweat.
When awareness trickled back, it came slowly.
Softness beneath him. Clean white sheets. A warm blanket tucked around his shoulders. The gentle, medicinal fragrance of herbs drifted through the air.
Kairo's eyelids fluttered open.
The ceiling above was smooth stone, softly lit by sunlight filtering through tall, arched windows.
"...Wh... where... am I...?" His voice emerged as a cracked whisper, barely audible even to himself.
He tried to sit up. Pain lanced through his arms and legs—dull, protesting aches from hours of walking and collapse. His small hands fisted weakly in the sheets as the reality settled in again, colder this time.
He was alive.
But he was still here—wherever "here" was.
And his family was still gone.
The hospital room lay wrapped in stillness. Only the faint, steady ticking of a wall clock and the gentle rustle of curtains stirred by an unseen breeze broke the quiet. Kairo closed his eyes, bone-deep exhaustion pulling at him after the endless walk and collapse at the gates.
Then—darkness swallowed him whole.
When his eyes snapped open again, the clean white walls and soft bed were gone.
He stood in an endless void. Thick, gray fog coiled lazily around his ankles, rising in slow spirals that never quite reached the nonexistent sky. No horizon. No ground beneath his feet that felt solid. Only the oppressive weight of nothingness pressing in from every direction.
"...Where... am I now?" The whisper barely escaped his lips. Fear clawed up his throat, sharp and cold.
That was when he saw it.
A tall figure cloaked entirely in writhing shadows drifted forward without sound or footfall. No face. No features. Just an absence where a face should have been—and the sheer presence of it made Kairo's knees buckle. He stumbled back a step, heart slamming against his ribs.
Before he could force out a single word, white-hot pain exploded through both arms.
He looked down.
His small hands—gone.
Clean stumps. Blood welled from the wounds in thick, dark rivulets, dripping into the void below and vanishing without a splash.
"Aaaaahhh!" The scream tore from his throat, raw and childish. "My hands—they're gone! Somebody—help meeeee! W-why... why are you doing this?!"
Tears streamed down his face in hot tracks as he stared at the bleeding stumps, body shaking violently.
The shadow's voice rolled through the emptiness—deep, ancient, and impossibly cold.
"Do you wish for strength, child?"
Even as sobs wracked him, the stumps shimmered. Flesh knit. Bone regrew. Skin sealed. In seconds his hands were whole again, small fingers flexing instinctively.
But before relief could even form—
The pain returned. Invisible blades sliced once more. Hands severed cleanly. Blood sprayed.
"This will continue..." the voice hissed, "...again... and again... for eternity."
Kairo's scream choked into a whimper. His legs gave out; he dropped to his knees in the fog.
"Unless..."
He lifted his tear-streaked face, trembling, barely able to focus through the haze of agony.
"Sign the contract... with your blood." The shadowed figure leaned closer, its voice dropping to a velvet promise laced with menace. "I shall make you stronger than any mortal. Refuse... and you will suffer this pain—one full hour—every single night."
Kairo shook his head frantically, black hair plastered to his wet cheeks. "I-I don't want this...! I just want to go home...!"
Silence.
Then the blades fell again.
Another scream—higher, weaker.
Pain. Regrowth. Pain. Again. And again.
Each cycle stripped a little more strength from his small body. His voice grew hoarse, his sobs quieter, until they were only broken gasps.
Finally, shoulders heaving, Kairo bowed his head.
"...I... I accept..."
The hooded lips curved into the faintest, coldest smile.
"Good... very good. Then our pact is sealed."
A long, clawed hand reached out—solidifying from shadow just enough to press against Kairo's narrow chest.
Fire erupted inside him.
Not the clean burn of fever—this was something darker, something alive. It carved deep, etching an invisible mark straight into his soul. Kairo's back arched; a strangled cry escaped him as every nerve screamed in protest.
The hand withdrew.
"Remember..." The voice lingered like smoke. "...I will return... when I am pleased."
The figure dissolved into the swirling fog, leaving only silence and the echo of its promise.
And then—
"—Haaah!!"
Kairo jolted upright in the hospital bed, lungs burning as he sucked in air. Cold sweat soaked his thin gown and plastered his hair to his forehead. His chest heaved in rapid, shallow bursts. Tiny fists clenched the sheets so hard his knuckles turned white.
He stared wildly around the sunlit room—at the white curtains, the ticking clock, the faint scent of herbs.
"...A... dream?"
His voice trembled.
But even as the words left his lips, a dull heat pulsed beneath his sternum—right where the shadowed hand had pressed.
Deep inside, something foreign now lived.
Something that had changed him forever.
Kairo slowly pressed a shaking palm over his heart, feeling the faint, unnatural warmth throb in time with his pulse.
It wasn't a dream.
And whatever had marked him... was waiting.
Moonlight slipped through the tall arched windows, painting the hospital room in soft silver. Kairo rubbed his eyes with the heels of his palms, still trembling from the nightmare's lingering grip. His heart hammered unevenly as he pushed himself upright, the thin blanket sliding down to his waist.
Then he noticed it.
His hands—his arms—they were... wrong.
No longer the slender, child-sized limbs he remembered. These were larger, thicker, corded with unexpected muscle. His skin felt rougher, tougher, like it belonged to someone who had already lived years of hard days. Even his chest and shoulders felt broader beneath the simple hospital gown.
"...Eh?"
The small gasp escaped before he could stop it. He scrambled off the bed in a rush, bare feet slapping against the cool stone floor. A tall standing mirror stood in the corner, catching the moonlight.
Kairo stepped closer. The reflection staring back made his breath catch.
He was tall—impossibly tall for the seven-year-old he knew himself to be. Not just taller... towering. His body now resembled that of a young man in his late teens, strong and solid. Strange garments clung to him—dark, fitted trousers and a loose tunic in deep charcoal—clothes he had never seen before, yet they fit perfectly, as though tailored by the world itself.
"What... happened to me...?"
His voice came out deeper than it should have. He lifted one hand, flexing the fingers, watching the unfamiliar muscles shift under the skin. A shiver ran down his spine.
Before he could process further, the heavy wooden door creaked open.
A long shadow stretched across the floor.
A man stepped inside.
He was enormous—easily eight feet tall, broad-shouldered, his frame packed with muscle that looked carved from granite. Even standing casually, arms relaxed at his sides, he radiated raw, quiet power. The moonlight gleamed off the faint scars crisscrossing his forearms and the thick silver clasp holding his dark cloak.
"Oi, kid," the man rumbled, voice like distant thunder. "You okay? You collapsed right at the kingdom gates yesterday."
Kairo's throat tightened. He had to tilt his head back sharply to meet the man's eyes. He's... huge...
The giant frowned, crossing massive arms over his chest. "At first, when we brought you in, you looked... different. Smaller. Weaker. But now..." His sharp gaze swept over Kairo again, assessing. "You seem normal. Just another citizen. So what really happened to you out there in the forest?"
The memory of the shadowed figure flared in Kairo's mind—the cold voice, the burning mark on his chest, the promise of endless pain. Panic spiked. He couldn't tell anyone. Not this stranger. Not yet.
He forced his lips into a weak, shaky smile and dropped his gaze to the floor.
"I... don't remember anything." His voice came out small despite his new size. "I don't know why I was there. I can't... remember."
It was a lie. Deliberate. Necessary.
The man's eyes narrowed, studying him for a long, heavy moment—as though he could peel back the words and see the truth underneath. Then he gave a low grunt.
"Hmph. Memory loss, huh? Figures." He uncrossed his arms and shrugged one massive shoulder. "That forest isn't normal. Most people don't survive a day in there—if they're unlucky, not even a second. You're damn lucky you stumbled out on our side instead of the other lands."
Kairo nodded silently, fingers tightening around the edge of the bedsheet until his knuckles ached. Inside, his thoughts spun in frantic circles.
I can't trust anyone here... If I tell the truth, they'll think I'm insane—or worse. I have to keep pretending I don't remember a thing.
He drew in a slow, unsteady breath, trying to calm the frantic beat of his heart.
But even as he steadied himself, a faint heat pulsed beneath his sternum—right where the shadowed hand had pressed. A quiet, insistent reminder.
The nightmare wasn't just a dream.
Whatever had marked him was still inside.
And it was waiting.
That night, sleep refused to come.
The hospital room lay hushed, lit only by faint moonlight slipping between the curtains. Kairo's thoughts churned in restless circles—memories of home, the shadowed contract, the impossible change in his body. Every time he closed his eyes, fragments of the nightmare clawed their way back.
Finally, he threw off the blanket and padded barefoot across the cool stone floor to the tall window.
He pressed both palms against the glass and looked up.
The sight stole his breath.
The night sky unfolded endlessly above the sleeping kingdom, a vast black canvas strewn with countless stars. They burned brighter and clearer than anything he had ever known—sharp pinpricks of silver and gold, glittering like scattered diamonds on velvet. No towering buildings drowned them in artificial glare. No haze of pollution softened their edges. Just pure, overwhelming radiance stretching from horizon to horizon.
"...So... beautiful..." Kairo whispered, the words slipping out unbidden. His chest tightened with a strange, aching wonder.
He stared, mesmerized. I didn't know stars could be this beautiful, he thought, eyes stinging. In his old world they had been faint ghosts behind city lights. Here... here it felt as though time itself had paused, giving him permission to simply look forever.
"Oi."
A deep, rumbling voice rolled from behind him.
Kairo startled and spun around.
The giant man—the same one who had questioned him earlier—stood framed in the doorway, arms crossed over his broad chest. Moonlight caught the faint scars on his face and the silver threads in his dark hair, but his expression was softer than before.
Kairo turned back to the window and pointed upward, voice trembling with raw awe.
"What... what are those things? They're so bright... I've never seen anything like it..."
The man blinked once, visibly surprised. Then the corners of his mouth twitched. A low, warm chuckle escaped him—quiet, almost reluctant—as he stepped closer, boots heavy on the stone.
"...Those are stars, boy. They've been up there since the beginning of this world."
"Stars..." Kairo repeated the word slowly, letting it linger on his tongue like something precious and new.
The giant studied him in silence for a long moment, sharp eyes searching the boy's face. Then, without warning, he reached out and placed one massive hand on Kairo's shoulder.
The weight was immense—enough to make Kairo's knees dip slightly—but the touch was careful, almost tender.
"Well then," the man said, voice softening into something gruff but genuine, "from now on, you're my son. I'll take care of you, alright?"
Kairo's eyes widened. His throat closed. Words refused to form.
A father...?
He had lost his real one—along with his mother, his siblings, his entire world—in a single blinding flash. The ache of that loss had been a constant, dull weight in his chest since he arrived.
But now, standing beneath this impossible sky, with the giant's steady hand anchoring him, something fragile flickered to life inside—a tentative, trembling spark of belonging.
He swallowed hard, blinking back the sudden heat behind his eyes.
"...O-okay," he finally managed, voice barely above a whisper and shaking.
The man's grin spread—wide, genuine, crinkling the corners of his eyes.
"Good. Then it's settled. From tonight onward... you're my adopted son."
He gave Kairo's shoulder one last gentle squeeze before letting go.
For the first time since the light had torn him from everything he knew, the hollow place in Kairo's chest felt... a little less empty.
He turned back to the window, gazing up at the endless stars once more. They seemed to shine a fraction brighter now—as if the sky itself had noticed, and approved.
The next morning, heavy footsteps echoed down the hospital corridor—slow, deliberate, commanding. Every nurse, healer, and passing attendant lowered their head in deep, instinctive respect as the man approached. Kairo noticed it immediately, eyes widening behind the curtain of his dark hair.
Why... why is everyone bowing?
The giant stopped at the foot of Kairo's bed. His sharp gaze softened just a fraction as it settled on the boy.
"Come. There's something you need to know."
Kairo slid off the bed without a word, heart thudding. He hurried after the man, his newly lengthened strides still falling far short of the giant's effortless pace. They moved through wide marble corridors lined with golden banners that caught the morning light like liquid fire. Statues of armored warriors stood silent watch in alcoves, and the air carried the faint scent of polished stone and blooming jasmine from hidden courtyards.
At last they reached an open balcony that overlooked the entire kingdom.
The view hit Kairo like a physical force.
Sprawling white-stone walls curved protectively around a city of towering spires and domed roofs. Far below, people moved through wide streets—many of them giants, some smaller but still far larger than any human Kairo had ever known. Gardens bloomed in impossible colors; fountains sent shimmering arcs of water into the air. Beyond the walls stretched rolling green hills under a sky so clear it hurt to look at.
The man rested one massive hand on the balustrade, staring out across his domain. When he spoke, his voice rolled like distant thunder—deep, unhurried, carrying the weight of absolute truth.
"I am not just a soldier... or a guardian. I am the King of this kingdom. The strongest warrior, and its ruler."
Kairo froze. His breath snagged in his throat.
"Y-you're... the King?"
The man—the King—nodded once. His gaze turned grave.
"Long ago, a prophecy was spoken. It said that on a certain day, a boy would come to these gates. A boy who would carry the future of this kingdom." He turned fully now, powerful eyes locking onto Kairo's. "And that child... was you."
Kairo's heart slammed against his ribs. He took an instinctive step back, head shaking slowly from side to side.
"M-me? But... I'm just... I'm just a kid... I don't understand..."
The King's voice dropped, gentling in a way that made the words feel almost intimate.
"The seer told me clearly: You will never have children of your own. But when the child of destiny arrives, you must raise him as your son. He will be kind. He will be strong. And he will lead the kingdom into its brightest age."
The prophecy settled into Kairo like stones sinking into still water. Ripples of disbelief, fear, and something dangerously close to hope spread through him. He wanted to shout that he wasn't from this world, that he was nobody special, that he carried a dark contract burning inside his chest—but the words lodged in his throat, trapped by the weight of the King's steady gaze.
The King stepped closer and placed one enormous hand on Kairo's shoulder. The touch was firm yet careful, like a mountain choosing gentleness.
"Well then, boy... from today, this palace is your home."
He swept his free arm outward, taking in the glittering halls, the soaring arches, the banners that snapped proudly in the breeze.
"Welcome to your new life, my son."
Kairo's eyes widened. His throat closed tight. He clenched his fists at his sides until his nails bit into his palms.
Deep inside, the fear still crouched—the memory of the shadowed figure, the promise of endless pain, the mark that pulsed faintly beneath his skin even now. But in this moment, beneath the open sky and the King's unwavering warmth, a fragile thread of safety wove itself around his heart.
"...Thank you," he whispered. His voice trembled, small against the vastness of the view.
The King's booming laugh rolled out, filling the balcony and echoing off the marble.
"Good! Then let us return home, together!"
He turned, cloak sweeping behind him like a banner of night, and started back down the corridor.
Kairo hesitated only a heartbeat—then stepped forward.
Into the palace.
Into the destiny that had claimed him.
And for the first time since the blinding light stole his old life away, the path ahead felt just a little less terrifying.
A week had passed since Kairo first stepped into the palace.
Strange miracles began unfolding beyond the walls. Fields that had once yielded modest harvests now burst with golden wheat swaying taller than a man's head. Orchards groaned under the weight of fruit so ripe and sweet the air itself tasted like honey. Rivers sparkled with schools of fish that leaped as though celebrating. Farmers gathered in small clusters, voices hushed with wonder.
"It all started when that boy arrived..." one murmured, glancing toward the palace spires.
But the greatest wonder unfolded within the grand halls themselves.
The King—who for years had been told by every healer and seer that he would never father a child—stood frozen in the throne room as the royal physicians delivered the news. His Queen had given birth.
A daughter.
Tears glistened in the giant monarch's eyes as he strode into the great hall. Nobles, guards, and citizens filled the space to capacity. Trumpets sounded a triumphant fanfare. Banners rippled like living flames.
The King raised both massive arms, voice thundering across the chamber.
"People of my kingdom! The prophecy has come true! The child who came to our gates has brought blessings upon our land. And by his arrival, the gods have granted me a daughter!"
The hall exploded into cheers. Feet stomped in rhythm; voices rose in joyous waves. They chanted the newcomer's name like a sacred hymn.
Kairo stood beside the throne, small despite his altered frame, cheeks burning under the sea of eyes. The King reached down, lifting Kairo's arm high with gentle strength.
"And hear this! From this day forth, my daughter's future husband shall be none other than this boy—Kairo!"
The roar redoubled, shaking dust from the rafters.
Kairo's face flushed scarlet. He waved both hands frantically, voice cracking.
"E-eh?! W-wait a second! I'm still a kid! I-I can't think about marriage yet!"
The King threw back his head and laughed—a deep, rolling sound that drowned out half the crowd.
"Bwahaha! No need to worry, son. There is plenty of time. But know this—the gods have chosen you. You are family now... and you are the future of this kingdom."
The chant swelled again: "Kairo! Kairo! Kairo!"
The King leaned down, voice softening for Kairo alone.
"Well, my daughter's name is Aria."
Kairo managed a shy smile, rubbing the back of his neck.
"It's a very good name. I like your choice."
From her seat beside the throne, the Queen—still radiant from childbirth—smiled through happy tears.
"At last... after all those years... I am a mother."
Though embarrassment scorched his face, warmth bloomed in Kairo's chest. For the first time since arriving in this world, he wasn't merely enduring. He was wanted. Needed. Claimed.
But in the deepest shadows of the palace, far from the light and laughter, a pair of glowing eyes watched.
The figure from his nightmare tilted its hooded head. A cold, satisfied smile curved beneath the darkness.
"...So, you've already begun to shine. Good. Very good..."
Later that night, alone in his spacious chamber, Kairo sat cross-legged on the wide bed, an enormous apple in his hands. He took a bite; juice ran down his chin. The flavor exploded—richer, sweeter, more nourishing than anything from his old world.
One slice feels like five—no, ten—apples back home.
He chewed slowly, thoughts drifting.
I watched so many isekai anime... wishing for exactly this. A new world, a new life. And it looks the part: old-style houses, castles, kings. But it's... different.
No poverty. Everyone's homes are the same size—commoners and nobles alike. Only the palace is a little grander. In anime the castles were always towering monstrosities dripping with gold. Here it feels... humble. Equal.
He drew a deep breath through his nose.
The air is so fresh. Oxygen levels must be higher. I remember that video: high O₂ means more stamina, sharper reflexes. But the downside... insects get bigger. Way bigger.
A small shudder ran through him.
And the fruit... after that contract, everything feels amplified. I'm stronger. Smarter. I can recall every detail perfectly now. Photographic memory?
He lifted his right arm—and froze.
For a heartbeat the limb flickered: severed, bleeding, gone.
The memory slammed into him like a blade. Pain echoed in phantom nerves. His breath hitched; sweat beaded on his forehead.
I can't forget it. No matter how hard I try, that moment keeps replaying. The cutting. The regrowth. The cutting again.
He squeezed his eyes shut, fingers digging into his scalp.
Stop. Breathe.
Slowly, the vision faded. His arm was whole again—stronger than before.
That contract... it's making me tougher. Mentally too. The old me would've cried all night. Now I can endure. The more I suffer, the stronger I get. I can feel it.
Kairo exhaled shakily and lay back on the soft bedding, staring at the high ceiling.
This world... everyone seems superhuman. Crazy strong. But me? I don't have any talent. No magic. No special skill.
At least... not yet.
His eyelids grew heavy. The day's exhaustion finally caught up.
As sleep claimed him, the faint warmth in his chest pulsed once—quiet, patient, waiting.
The stars outside his window burned on, silent witnesses to a boy who was no longer quite the same.
Sunlight streamed through the tall windows of the private dining hall, gilding the long table laden with silver platters. Freshly baked bread steamed beside bowls of vibrant fruit, roasted meats glistened with herbs, and the air carried the rich scent of spiced tea. Kairo sat straight-backed in his chair, eyes wide as he took another careful bite of the golden pastry in front of him. The flavors burst across his tongue—sweet, buttery, impossibly rich.
The Queen watched him with a gentle smile, chin resting lightly on her interlaced fingers.
"Well, Kairo? Is the food good?"
Kairo swallowed quickly, cheeks flushing with genuine delight. He gave her a bright, polite smile.
"Yes, it's very good, Mother! It's way too tasty—the food here smells so amazing."
The Queen's eyes sparkled for a brief moment, almost glowing with quiet amusement.
"Really? In your old world, the food wasn't that good?"
Kairo froze mid-bite. The pastry hovered near his lips. Slowly he lowered it, eyes widening in shock and curiosity.
"H-how did you know I'm from another world?"
The Queen's smile never wavered—warm, knowing, utterly calm.
"Well, Kairo... I have eyes. I can see you're lying. You're not from our world."
Kairo's shoulders slumped. He set the pastry down and rubbed the back of his neck, cheeks burning with embarrassment.
"Yes... you're right. I'm not from here. But how did you figure it out?"
She tilted her head slightly, expression still soft.
"After training, I'll reveal it—if you tell me about your old world. And by the way, you can stop pretending you lost all your memories. You're a very bad actor, Kairo."
Kairo's face turned scarlet. He ducked his head, voice small.
"What... you knew that well? I—I won't lie next time."
"Good. Don't lie next time." Her tone was gentle but firm, like a mother correcting a beloved child.
A short while later, as Kairo stepped out of the palace corridors toward the training grounds, a figure appeared ahead of him—an elderly man dressed impeccably in a crisp black suit, silver hair neatly combed, posture straight as a blade.
The man bowed deeply.
"Hey there, young master. I am your new butler. I will take care of you from now on."
Kairo blinked, then broke into a wide grin, energy surging.
"Woah—so you're my butler? Okay then, show me where I have to train! I'm fired up!"
The butler's lips curved in the faintest smile.
"Of course, young master. That's the spirit. Follow me—I will show you where you are to train."
The clang of steel rang through the open air.
The training fields behind the palace sprawled wide under the midday sun, dotted with soldiers drilling in perfect formation. Sweat gleamed on armor; wooden swords cracked against shields; shouts of effort mixed with the rhythmic thud of boots.
In the center stood the King—towering, immovable, arms folded across his broad chest. Kairo approached, gripping a wooden practice sword that felt absurdly heavy in his hands. The weight pulled at his shoulders, but he refused to let the tip dip.
The King looked down at him, voice rumbling like distant thunder.
"Well then, Kairo. Before you even touch magic, you must first learn the way of the sword."
Kairo tilted his head, brows furrowing.
"But... why, Father? Wouldn't magic be stronger?"
The King chuckled, deep and warm, shaking his head.
"Magic can fail. Spells can be sealed. Mana can run dry. But your body—your courage—those remain. When all else fails, steel and spirit are your last weapons."
He leaned closer, eyes burning with the intensity of a lifetime spent on battlefields.
"Listen well, my son. Even if you lose... even if you fall... you must never quiver. Never bow to fear. For demons, enemies, traitors—they will test you. And if you falter, the kingdom falls with you."
Kairo's fingers tightened around the hilt until his knuckles whitened. His heart pounded so hard he could feel it in his throat.
The King's voice softened, almost tender.
"You are kind, Kairo. And that is your greatest strength. But kindness alone cannot protect the people. You must be strong. Strong enough to face those who would conquer us. Strong enough to fight... for your kingdom."
The nearby soldiers had gone quiet, listening with bowed heads, respect etched into every line of their stance.
The King straightened to his full, imposing height. His voice boomed across the field.
"From now on, you will train harder and harder. You will fall. You will bleed. But you will rise again. For you are my son... and the future King!"
Kairo's chest tightened with a rush of emotion—fear, awe, determination all crashing together. He lifted the heavy wooden blade, arms trembling but refusing to lower it.
"...I'll do it," he whispered. Then, louder, voice cracking with resolve: "I'll do it, Father! I'll protect this kingdom!"
The King's grin split wide, pride blazing in his eyes like twin suns.
"That's the spirit, boy. Now—show me your resolve!"
He raised his own massive training sword in a single, fluid motion, the weapon cutting the air with a low whistle.
Kairo swallowed hard, planted his feet, and raised his blade to meet it.
The first clash was coming—and with it, the beginning of everything.
The training field lay hushed under the late morning sun, broken only by the distant chirp of birds and the faint rustle of wind through the grass. Kairo stood rigid in the center of the open ground, pulse hammering as the King approached carrying two heavy iron weights in each massive hand.
With a metallic clank, the King knelt—bringing himself almost eye-level with the boy—and fastened the cuffs around Kairo's slender ankles. Each weight was fifteen kilograms, solid black iron, cold against his skin and unyielding as stone.
Kairo stared down at his legs, now anchored by the brutal mass.
"...T-These are huge... Father, are you sure I can—"
"Move."
The King's command cut through the air—firm, expectant, leaving no room for doubt.
Kairo swallowed hard. He hesitated, then bent his knees and tried to lift one foot. His whole body quivered under the sudden strain, muscles screaming in protest... but—impossibly—the foot rose. An inch. Then two. The other followed. Slowly, unsteadily, he managed a single shuffling step forward.
"...Eh?" The gasp slipped out before he could stop it. "I... I can move...?"
The King's sharp eyes gleamed with quiet, fierce pride.
"Good." He rose to his full towering height, arms folding across his chest. "A normal child might manage ten kilograms. But you... you have to train harder than anyone else just to stay ahead. To surpass them, you cannot train at the same intensity. You must surpass their hard work, their effort, their discipline. Only then will you become stronger than the rest."
Kairo's chest swelled with a sudden flicker of pride—fragile, but real. The words sank deep, kindling something hot and steady inside him. But the King wasn't finished.
He lifted one enormous arm and pointed toward the mountain that rose like a sleeping giant just beyond the palace walls. Its slopes were steep and rocky; its peak vanished into a veil of clouds.
"Now then, Kairo." The King's voice rolled low and serious. "You will run to the top of that mountain... and back down. Four times."
Kairo's jaw dropped open. His eyes widened to saucers.
"F-Four times?! With these weights?!"
The King's grin stretched wide—fierce, approving, almost predatory.
"That's right. If you want to protect this kingdom, if you want to stand as a king one day... you must first conquer your own weakness. Will you handle it?"
Kairo's tiny fists clenched around the hilt of the wooden practice sword still strapped to his side. His legs trembled violently beneath the iron burden, thighs already burning, but something fiercer burned hotter in his chest—determination edged with raw, stubborn will.
He lifted his gaze to meet his father's eyes. His voice came out small at first, then steadied, clear and unshaken.
"...I'll handle it. I'll do it, Father!"
The King threw back his head and laughed—a deep, booming sound that rolled across the empty field like thunder.
"That's my boy! Now show me your spirit!"
Kairo drew in a long, shaky breath. Then he took his first real step.
The weights dragged like anchors chained to his soul. Each stride felt like hauling boulders uphill through mud. Sweat beaded instantly on his forehead; his calves screamed with every lift. His breathing turned ragged almost immediately.
But he didn't stop.
He couldn't.
One step. Another. The mountain path loomed ahead—narrow, winding, merciless.
Behind him, the King watched in silence, arms crossed, expression unreadable but eyes burning with pride.
Kairo gritted his teeth, forced another step, then another.
Because deep inside—beneath the pain, beneath the fear, beneath the impossible weight—he knew.
This was only the beginning.
And he would not break.