Embracing the scorching, delicate body, Haruto poured his climax into Ruri, combining it with the stimulation of lightning elements. She soon experienced the same sensations as Reina and Yukina.
A broken, shuddering cry was torn from her lips as the lightning magic crackled over her skin, not as pain but as a thousand points of exquisite, unbearable sensation. Her back arched violently off the floor, every muscle in her body drawn taut like a bowstring as the convulsions of her climax were amplified and prolonged by the elemental energy coursing through her.
Wave after wave of pleasure crashed over her. Her tongue lolled slightly to the side, her pupils rolled upward, and Ruri collapsed onto Haruto in a daze, trembling uncontrollably.
Haruto held her through the aftershocks, his own groan of release muffled against her sweat-slicked skin. He could feel the precise moment his essence flooded her, a hot, pulsing rush that seemed to trigger another, smaller series of tremors within her. The air itself hummed with the residual magic of their union.
Sensing the slight increase in his own magical power, Haruto picked up Yuki and continued his lovemaking session.
Yuki mewled softly as he pulled her onto his lap, her body still sensitive and trembling from watching the others. Her own need was a palpable thing, her juices already coating her inner thighs. "H-Haruto-kun... please..." she begged, her voice a breathy whisper as she guided him to her aching, neglected entrance.
The strength of Reina and the other three ranged between C-rank and D-rank. While this wasn't a significant boost for Haruto, who had fused with demon blood, it was still far more useful than the Takamine sisters.
He drove into Yuki in one smooth, powerful thrust, swallowing her sharp cry of pleasure-pain with a deep kiss. Her tight vagina clenched around him rhythmically, as if her very body was trying to milk him dry, to pull every drop of his potent seed into her womb. Her nails scored his back as she clung to him, her legs locking around his waist.
Haruto had deliberately exposed the hidden world to them, hoping to encourage the Takamine sisters to begin training in magic as well.
Now, that desire burned even stronger.
He flipped Yuki onto her hands and knees, taking her from behind with a new, possessive fervor. Each thrust was a promise of power, a lesson in ecstasy. The slap of skin on skin echoed in the room, a lewd counterpoint to her choked sobs of pleasure. "This... this feeling... is magic," he growled in her ear, his hands gripping her hips hard enough to bruise.
Not only for the sake of better dual cultivation but also for their safety.
No matter their innate talent, as long as they could cultivate, with Haruto's help, they would at least be able to defend themselves against ordinary threats.
The dual cultivation ability replenished his energy, while his devil bloodline and Basic Body Mastery greatly enhanced his stamina.
He felt his pleasure peak again, a building pressure that promised another devastating release. Yuki's inner walls fluttered around him desperately, her third climax crashing over her and pulling him over the edge with her. He held himself deep, grinding against her as he spent himself inside her with a guttural roar, feeling her milk every last spurt of his seed.
With the aid of enchantment skills, he had already been able to handle all four women alone—now, it was effortless.
Only when the first light of dawn crept across the horizon did Haruto finally stop.
Four naked bodies lay sprawled across the living room floor, their snow-white legs spread wide as white liquid slowly trickled from their swollen, reddened pussies.
The room was thick with the musky, sweet scent of sex. Each girl was painted with the evidence of their long night—glistening sweat, love bites on breasts and necks, and the distinct, pearlescent trails of Haruto's essence seeping from their well-used pussies and pooling on the floor beneath them.
Gazing at Reina and the others' slightly swollen bellies and their dazed expressions, Haruto murmured, "I got too carried away in my excitement…"
He ran a hand over Reina's stomach, feeling the faint, warm swell of his own making. A primal thrill shot through him at the sight and the sensation. She whimpered in her exhausted sleep, her body instinctively pressing into his touch.
While Haruto had been fucking the girls all night, Rias and Sona hadn't been idle either.
After failing to convert Haruto into a servant, Rias quickly delegated her duties to Akeno and immediately returned to the Underworld.
If she couldn't find answers in her family's archives, she would seek out her elder brother, one of the current Four Great Satans.
If even that yielded no solution, she would explore other methods of forming a servant contract…
Twirling the devil chess piece that carried Haruto's aura between her fingers, Rias's eyes flashed with determination.
...
Meanwhile, Sona listened attentively to Tsubaki's report, one hand flipping through books while the other swiftly recorded information about Haruto.
After just one round with Tsubaki, aside from replicating her talents and skills, they had already deciphered the nature of Haruto's dual cultivation ability.
This was the terrifying depth of a family's legacy.
Of course, it was also inseparable from Sona and Tsubaki's own abilities and insight.
"Similar abilities have existed before," Sona said, closing the thick leather-bound tome in her hands. "But one with absolutely no side effects is certainly worth investing in."
"It's not entirely without side effects," Tsubaki replied with a bitter smile, her beautiful face tinged with worry. "Though my strength has improved, this feeling of being marked as someone's exclusive…"
The stronger one became, the more sensitive they were to changes in their own body.
If Haruto, who had only just acquired an intermediate devil bloodline, could discern the truth of the dual cultivation ability, then Tsubaki could certainly sense the abnormality in her own body.
"I think it's perfectly normal."
Sona adjusted her glasses and analyzed calmly, "Being with Haruto not only satisfies you physically but also enhances your magic power. Even without that influence, I doubt you'd have any interest in other men now."
The growth of strength is equally exhilarating, especially the increase in magical power.
The stronger one becomes, the more intense the craving for magical energy grows.
Compared to the physical body, magical power and spirit are the true foundations.
As long as magic and spirit remain, even a destroyed body can be revived.
Of course, there are costs involved, and one must possess sufficient strength to achieve this.
Tsubaki nodded. "Indeed, aside from being permanently bound to Haruto, there are no other drawbacks."
"Mm, and once Haruto's strength surpasses yours, you'll gain even greater benefits."
Sona pondered, "A constitution that simultaneously enhances both parties' strength without any drawbacks... I don't think such a thing has appeared in history before."
"Could the failure to convert him into a servant also be related to Haruto's constitution?" Tsubaki asked.
Sona shook her head—she wasn't sure either.
Logically, the two shouldn't conflict, yet the fact remained that Haruto's conversion had failed.
Tsubaki frowned slightly, murmuring, "It might not necessarily be a complete failure."
"What do you mean?"
"When I escorted Haruto home, I thought I sensed a familiar aura on him."
Her expression wavered uncertainly. "The sensation was too faint... I might have been mistaken..."
"A familiar aura? What exactly do you mean?" Sona looked at Tsubaki curiously. "Think carefully."
"It was the scent of a devil—one that shares the same origin as me, bearing the bloodline of the Sitri Clan."
Sona took out the Evil Pieces infused with Haruto's essence and chuckled softly. "So it wasn't a complete failure after all."
Haruto's intermediate devil bloodline originated from Tsubaki, naturally sharing her lineage.
Through a twist of fate, Sona and Tsubaki had mistaken this as the result of a failed servant conversion.
"But in that case... will the Rating Game recognize Haruto's participation?"
Sona waved her hand dismissively. "There are many ways to convert servants, and some are far more stable than the Evil Pieces."
Since the dawn of devils, the conversion of servants has never ceased. Devil chess pieces emerged as a method suited to the times, hence their widespread use.
It wasn't the only way to create servants.
In truth, servants were essentially slaves, while the one holding the King piece was the master.
The devil chess conversion merely lacked a strict contract, and for the sake of appearances, they were referred to as "servants."
"Exactly. Even if your senses were mistaken, we can always try again using another method."
After a moment's thought, Sona added, "Though we'll need to report it afterward and likely surrender one chess piece."
Only someone like Sona, whose sister was one of the current Four Great Satans, could afford such confidence. Others wouldn't have it so easy.
If everyone acted this way, demon chess pieces would lose their purpose.
Though their reasoning differed, Rias and Sona—close friends—once again arrived at the same solution.
...
...
After using Reina and the others' phones to send leave requests, Haruto began cleaning up the chaotic living room.
But first, he had to wash the four unconscious, naked bodies.
By the time the Takamine sisters woke up, Haruto had just finished bathing all four.
"Saaya-nee, Yuri-nee, please take the day off and help me look after them."
Haruto carried the limp Yukina in his arms as he walked toward the bedroom, saying, "Sasaki, when you have time, I'd like you to help guide Ayame and Yuri in learning magic."
Yukina lazily glanced at the Takamine sisters, licked Haruto's neck, and murmured, "Guidance isn't a problem, but we can't guarantee they'll actually learn it~~"
"Don't mess around. If you stir things up, you'll be responsible for putting out the fire."
Subconsciously touching her slightly swollen belly, Yukina stiffened for a moment before obediently curling up in Haruto's arms.
She had no choice—not only was her stomach full, but her lower regions still burned. Trying to extinguish anything now would only torment herself.
After settling Yukina in the room, Haruto did the same for Reina, Ruri, and Yuki. Similarly, he asked them to guide the Takamine sisters on the basics of magic once they had recovered a bit.
The three nodded in agreement before drifting off to sleep one after another.
"L-Little Master, who are they?"
Looking at the four beautiful girls lying under the covers, Sayuri pouted unhappily. "Did you sneak out and spend the whole night with them after we fell asleep?"
"They're my classmates, and they also know magic."
Haruto pinched Sayuri's delicate cheek and chuckled. "They were here before you two, you know~"
"Counting that Tsubaki senpai from yesterday, that makes five already."
Sayuri huffed angrily. "Just how many women do you have out there?"
Haruto thought for a moment before answering seriously, "Only these for now, but there'll probably be more in the future."
"Ugh!"
Sayuri puffed out her cheeks, her face clearly displeased.
She knew she couldn't have Haruto all to herself, but that didn't stop the discomfort in her heart.
"Don't worry. No matter how many women there are, I won't neglect you two."
Haruto had meant to comfort her, but the words came out differently.
Thanks to his thorough training, the Takamine sisters didn't find anything odd about his statement. Ayame, in particular, couldn't care less about how many women Haruto had.
As long as she was satisfied, she didn't mind how much he fooled around outside.
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