Chapter 1
In Konoha, as the sunset gradually dipped toward the horizon, a young boy stood just outside the wide-open gates.
"Little Yu! Stay put in the village and don't wander off. If anything important comes up, go tell Granny. Big Sis has a mission, so I won't be able to stay with you!"
A beautiful blonde girl, about sixteen or seventeen, with her golden hair tied in a single high ponytail, spoke tenderly to the boy cradled in her arms.
Though she looked only fourteen or fifteen, her beauty was breathtaking. Clear hazel-brown eyes, soft full red lips, a delicate and adorable nose—her features were exquisitely refined. Her fair skin glowed, and the vibrant golden ponytail gave her an energetic, heroic aura.
The boy appeared six or seven years old, with short black hair, porcelain-pale skin as tender as a newborn's, and pure blue-white eyes that seemed to hold an endless sky, drawing anyone in with their mesmerizing depth.
This boy was Senju Ling Yu, the next heir to the Senju clan.
The golden-haired beauty holding him was his (adoptive) sister—Konoha's princess, Senju Tsunade.
Ling Yu was originally from another world.
A traffic accident had sent him transmigrating into the Naruto universe, where he replaced Tsunade's original little brother, Senju Nawaki, becoming the future leader of the Senju clan.
In the current Senju clan, Ling Yu was the only male with the potential to awaken the Wood Release bloodline.
To protect the clan's future, Tsunade guarded him fiercely, and their bond had grown incredibly deep—almost inseparable.
When he first arrived, the system that brought him here had appeared once. But it had fallen into a deep sleep due to depleted energy, leaving him only with the Sage Body as a beginner reward before vanishing.
Starting off on the wrong foot, Ling Yu wasn't discouraged. The system would wake up eventually, so he simply lived normally for the past six years—until now.
"I know, Sis. You take care too, and watch out for that perverted old guy!"
Ling Yu buried his face in Tsunade's chest, inhaling deeply as his small arms wrapped tightly around her waist. After a long moment, he lifted his head to reply.
Though reluctant to see her go, he knew she wouldn't be away long. So he relaxed, reminding her to stay safe while casually taking a jab at Jiraiya.
He was extremely wary of the future "Pervy Sage" of the ninja world and was determined to give him zero chance to get close to Tsunade.
"Mm!"
Tsunade nodded cheerfully.
She didn't know why her little brother always targeted Jiraiya, but seeing him happy made her happy too. So she let him do as he pleased.
Tsunade gently stroked Ling Yu's head while holding him close. The thought of not seeing him for several days made her arms tighten, as if she wanted to merge him into herself.
Ling Yu stayed perfectly still in her embrace, resting against her developing softness and savoring the comforting sensation, his heart filled with endless emotion.
It was hard to imagine how, in just a few years, Tsunade's figure would explode into the legendary "most powerful bust" in the entire ninja world—from flat now to absolute perfection!
But just as the two were cherishing their farewell hug, an angry voice boomed from afar.
"Damn brat! I just got here and already hear you badmouthing me! Say it again if you dare!"
Jiraiya, who had just reached the gate, heard Ling Yu's jab and instantly had veins popping on his forehead. He shouted furiously at the boy.
Though only sixteen or seventeen, his wild white hedgehog hair and lecherous expression made him look like a forty-something uncle—no wonder Ling Yu called him that.
"Heh, Ling Yu isn't wrong. Tsunade, you really should be careful around Jiraiya."
Orochimaru, walking behind, never missed a chance to mock his teammate and quickly delivered the finishing blow.
At this point, Orochimaru hadn't yet delved into human experimentation or lost his ambition to become Hokage. He still felt strong loyalty to the village and genuinely enjoyed life with his comrades.
"Hmph! See? I told you! Perverted Uncle Jiraiya! What are you gonna do about it?"
Ling Yu poked his head out from Tsunade's arms, sticking his tongue out at Jiraiya with obvious disdain.
Tsunade was long used to the rivalry between her brother and Jiraiya. She said nothing, simply holding Ling Yu and watching their banter with amusement.
The argument lightened her sadness about leaving, and a relaxed smile appeared on her face.
"Argh! You little punk! One day I'll teach you a real lesson!"
Jiraiya clenched his fists secretly, his eyes blazing with anger toward Ling Yu.
Everyone knew Jiraiya liked Tsunade.
Every time he tried to pursue her, Ling Yu would swoop in and ruin everything. Over time, they'd become sworn enemies.
He'd once considered disciplining the kid privately, but whenever he made a move, Tsunade would appear behind Ling Yu like clockwork—as if the boy predicted every attempt. Each time, Jiraiya ended up getting pummeled by her.
Sometimes he got beaten even when he did nothing, just because Ling Yu accused him falsely. Truly tragic.
Today, Jiraiya had been feeling down knowing Tsunade was leaving the village. He planned to use the mission trip—without Ling Yu around—to finally win her over with his self-taught flirting skills.
But the moment he arrived, Ling Yu was already warning her to stay away from him—and trash-talking him in the process! It was as if the kid was determined to sabotage him before he even started!
(Though honestly, even without interference, success was impossible—Tsunade had already said she felt nothing for him.)
"Coward! Perverted uncle! Bleh bleh bleh~"
"Don't even think about getting close to my sister on the mission! To be honest, Sis is mine—I won't let anyone have her!"
Seeing Jiraiya grinding his teeth, Ling Yu found it hilarious and made another exaggerated face.
Tsunade, hearing those words, beamed with joy, her pretty brows curving even more.
"Damn brat! Ruining my plans and mocking me! I'm gonna beat you senseless!"
Jiraiya, hit right in his sore spot, exploded with rage. He yelled and charged forward, ready to give the kid a thrashing.
BAM!
But the moment he got close—before he could even swing—Tsunade's fist sent him flying.
Her monstrous strength was already perfected; she could snap thick trees like twigs with ease.
A mere mortal like Jiraiya? He flew seven or eight meters, tumbling across the ground before stopping.
This was Tsunade holding back. If she went all out, Jiraiya could forget the mission—he'd be in the hospital for three or four months.
"Trying to bully my little brother? Are you looking to die?"
Still in her punching stance, Tsunade set Ling Yu down and glared darkly at the sprawled Jiraiya.
When she was young, she'd lost her parents, then her grandfather soon after. Only Ling Yu had always been by her side, so she'd long considered him the most important person in her life.
In her eyes, anyone who dared hurt him had to go through her first.
She tolerated their usual bickering, but the second Jiraiya tried to lay a hand on him? Unforgivable. Even she rarely hit Ling Yu herself—how dare this guy even think about it!
"So violent… The moment it involves Ling Yu, Tsunade turns into a completely different person. That punch just now could've crippled an elite jonin."
Orochimaru took in the whole scene, wiping imaginary cold sweat from his brow as he vowed never to mess with Ling Yu.
With a pitying glance at Jiraiya, he moved to help his teammate up. Though they bickered constantly, years of friendship still mattered.
"Tsunade, it's getting late—we should get going. Ling Yu has things to do too, right?"
Orochimaru turned and winked at Ling Yu, signaling him to play along.
"Yeah! Sis, if we don't leave now, it'll be dark. I promised Granny I'd visit her today!"
Ling Yu caught the hint immediately and tugged at Tsunade's sleeve.
If Jiraiya got crippled, where would the future entertainment come from? After all, the guy was destined to become a legendary author—Ling Yu was dying to swap "creative tips" with future Jiraiya someday.
"Alright! Be good and listen to Granny, Ling Yu. Sis will come back to see you in a week. Mwah!"
Tsunade's face instantly brightened at the gentle tug. Noticing the darkening sky, she realized they couldn't delay any longer.
She planted a firm kiss on Ling Yu's cheek, then hurried off with the other two.
"Sis, bye! Safe travels!"
Ling Yu waved at the departing Tsunade and the dragged-along Jiraiya until they vanished from sight, then turned and headed home.
…
Senju Clan Compound
"Pitted Jiraiya again today—tonight I'll treat myself to a big fatty beef hotpot!"
Ling Yu skipped happily toward the residence he shared with Tsunade—the Senju estate.
Ding! Dimensional Treasure Chest System initializing…
The moment he stepped through the door, a mechanical voice suddenly echoed in his mind.
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