Chapter 51 Dual Cultivation Ability (Part ③)*
Edited by: Kanaa-senpai
”Now that our strength has grown, we didn’t just pass the test…”
Kurumizaka Ruri pressed her soft, supple body against Aki, rubbing against him incessantly. With a dazed, lust-filled look in her eyes, she began to pour out the whole story. As Aki listened to her tale, his mind settled, followed by a sudden jolt of excitement. The phenomenon occurring within the four girls—including Ruri—was exactly as he had hypothesized.
Furthermore, the effectiveness of Dual Cultivation was tethered to the physical constitution and the current power levels of both partners. Constitution was largely a matter of luck, but in terms of power, the lower-ranked partner always reaped the greatest rewards. Conversely, the stronger the individual, the less significant the boost. This explained why Aki’s Mana reserves had suddenly spiked after his night with Shinra Tsubaki; she was an A-rank, while Aki had only just been knocking on the door of B-rank at the time. Now that his Devil lineage had fully integrated overnight, he had officially and firmly stepped into the B-rank realm.
Aki finally realized why the five-pointed star on his status panel had only specified how to acquire Talents and Skills. Those were the mechanics he might never have puzzled out on his own, whereas the effects of the abilities themselves were usually self-explanatory once put into practice. Now that he was certain of the truth behind his power, a surge of adrenaline hit him. Inside Hamazaki Reina’s body, “Little Aki” swelled even further.
”It’s… it’s getting even bigger…”
Her “flower valley” spasmed around him. Unable to contain herself, Reina let out a series of breathless moans. “I’m… I’m going to go! I’m peaking!”
To show his “sincerity,” Aki redoubled his efforts, quietly activating his newly acquired Enchantment skill. Reina was already balanced on the edge of the abyss; as Aki’s speed intensified and a numbing, electric sensation stimulated the very core of her being, she let out a shattered cry. Her eyes rolled back until only the whites showed—she had reached a peak unlike any she had ever known.
Aki felt a sudden splash of wet heat against his lower abdomen. Looking down, he realized he might have overdone the stimulation. He had actually made Hamazaki Reina lose control of her bladder.
Withdrawing the Enchantment effect, Aki thrust deep one last time. As her cervix pulsed and contracted violently, he pumped his Essence² into her in heavy, rhythmic waves. As the scorching heat flooded her “flower chamber,” Reina shuddered one last time. Her emerald eyes went vacant, and her long, slender legs straightened before curling back in a final spasm. Her body went completely limp, slumping backward. If Sasaki Yukina hadn’t been there to catch her, she would have fallen right off Aki.
Reina’s lust had been pushed to the absolute limit during the teasing, and Aki’s specialized Enchantment attack had sent both her mind and body into total transcendence. After helping the unconscious Reina onto the sofa, Sasaki Yukina wasted no time in taking her place. She licked her crimson lips, guiding Aki back inside her with her small hands, a look of predatory satisfaction on her face.
”Uesugi, you made Reina feel that good… you better not play favorites.”
Yukina assumed it was simply Aki’s stamina at work, having no idea he was utilizing a new skill. Her greed for pleasure was met with an immediate shock; her eyes went wide, her snow-white neck arched back, and her seductive body began to convulse as if struck by a high-voltage current. Aki gripped her slender waist, channeling the Lightning element to easily subdue her.
Bolstered by her Physical Activation Talent, Yukina was fearless. As soon as her initial tremors subsided, her slick, soaking walls clamped down on him again. Pink hearts flickered in her crimson pupils as she slowly ground her hips against him.
(Uesugi… was that magic just now?)
She felt the Mana surging within her, but as a physical combat specialist, she wasn’t entirely sure. The tingling stimulation was so intense that her tender flesh instinctively gathered Mana to try and resist the overwhelming pleasure.
”Hmph… Well? How does it feel?”
The internal pressure intensified instantly. Aki grunted; once you understood the principle, it applied to everything. Just like natural elements, using Mana to reinforce the body could be applied to s*x as well. Between the lethal suction, the crushing vacuum of her grip, and the friction of three thrusts per second, even Aki’s battle-hardened stamina only lasted three minutes.
Slap!
Aki pinned Yukina down, the sound of their bodies colliding echoing through the dead of night. With a final surge, he broke through the final resistances of her internal walls and hit the mark.
”Ah… mm… hnn… I’m… I’m dying… I’m going to die!”
The scalding torrent hit the most sensitive part of her womb. Yukina’s toes curled tight as a soul-deep moan escaped her. She clung to Aki, her sweat-slicked skin pressed flush against his chest, her expression one of total, mindless bliss. It felt too good—so good that she couldn’t think, couldn’t breathe; she only wanted to stay in his arms forever.
Finally, Kurumizaka Ruri pushed the lingering Yukina aside. “It’s Ruri’s turn! My mouth is dry from all that talking.”
Aki had no intention of neglecting his “star witness.” From the very first thrust, he utilized the Enchantment skill. Through repeated use, he was mastering the nuances; at minimum power, it provided a constant, electric pleasure that kept the girl’s nerves on fire without forcing an immediate climax. By saving the big burst for the finish, he could ensure the most explosive experience possible.
Dual Cultivation wasn’t just about the physical release; it was about the psychological bond. It was the ultimate way to foster “affection.”
”Ah… yes… right there, mmm~!”
Ruri tangled herself around him, her breath coming in hot pants, the pink hearts in her eyes glowing with intensity. Aki moved with a deliberate, rhythmic pace, his hands exploring every inch of her soft, porcelain skin. Every time he brushed a sensitive spot, her moans spiked, and her “flower valley” tightened around him like a vice.
Ruri arched her back, her small tongue darting out. “Uesugi… nnn~ kiss me…”
Aki leaned in, meeting the silver-haired girl’s lips with a passionate kiss. Ruri let out a muffled whimper of pure contentment, slumping against his shoulder.
”Nnh… this is it… Uesugi, love me… love me hard…”
”Being loved by you like this… how are we ever supposed to look at another man again?”
Aki’s brow jumped. He reined in his impending climax, slowing his movements. “What do you mean by that?”
”Don’t stop! Please!” Ruri wiggled her slender waist, her voice dripping with desperation and lust. “I’m almost there!”
Aki slowed to a torturous crawl. “Tell me what it feels like to do it with me. Give me a good answer, and I’ll let you peak.”
”You’re so mean… keep moving, Ruri will tell you!” She looked at him with puppy-dog eyes, pouting because he was teasing her after sending Reina and Yukina to the moon. “You were wondering why we don’t look for other guys, right?”
She bit her lip, looking both shy and flustered. “The truth is… after doing it with you, we’ve completely lost interest in anyone else. At first, it wasn’t so bad, but the more we do it, the more other men just… disappear. When we think about s*x, we only see you. Every other man, physically and mentally, just feels like… nothing.”
”For real?” Aki looked down at the flushed, shivering girl. “I haven’t even officially started my ‘training’ program yet, and you’re already my exclusive flesh-toilets?”
Kurumizaka Ruri wrapped her white, shapely legs around his waist, squeezing him with everything she had. “Yes! I’m your exclusive flesh-toilet! Please… just move!”
Aki began his final sprint. He had only intended to verify the mechanics of Dual Cultivation, but he hadn’t expected this “imprinting” side effect. It wouldn’t be hard to verify; he just had to check with the other girls he’d “exchanged fluids” with. If Dual Cultivation truly had this effect… then the final weight on Aki’s mind was gone.
Facing a world full of familiar heroines, he could finally stop holding back. It was time to show this world exactly what he was capable of.
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Summary:
Aki confirms that his ‘Dual Cultivation’ ability allows him to gain strength through s*xual encounters with high-ranked partners. He tests his new ‘Enchantment’ skill on Reina, Yukina, and Ruri, discovering that his mana significantly influences their pleasure and loyalty. Ruri reveals a hidden effect: the girls have lost all s*xual interest in other men after being with Aki.
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Trivia:
- Aki is now officially B-rank.
- Shinra Tsubaki is A-rank and was the catalyst for Aki’s recent power jump.
- Dual Cultivation is less efficient than ‘predatory’ harvesting but safer.
- Aki’s ‘Enchantment’ skill uses the Lightning element to stimulate nerves.
- The term ‘flesh-toilet’ (绒布球) is a specific trope for a submissive, broken toy.
- Physical Activation is Yukina’s specific talent
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Character Insight:
Aki shifts from a tactical survivor to a dominant ‘master’ figure as he realizes his ability ensures the absolute loyalty of his partners. The girls show signs of psychological and physiological dependency on his mana-infused touch.
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Lore And Worldbuilding Context:
The author uses ‘Flower Valley’ as a consistent euphemism to bypass literal anatomical filters while maintaining a ‘system’ cultivation aesthetic.
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Glossary:
Notes:
• Kurumizaka Ruri – Silver‑haired, twin‑tailed, large‑busted girl with a pointed chin, petite and cheerful. Former gray‑blonde teen from Imaizumin Chi wa Douyara Gal no Tamariba ni Natteru Rashii, now at Hidden Academy, member of Reina’s trio. Clingy, affectionate, teases Aki, offers her empty house, wears black pantyhose, contributes Mental Resistance, pragmatic yet curious about mixed‑blood races. Classmate and cultivation partner of Aki, recently passed a test thanks to him.
• Aki – A reincarnated Devil-lineage student with an athletic build and A-rank potential, Uesugi is the charismatic male protagonist of Kuoh Academy’s Occult Research Club, wielding Dual Cultivation and Mana-Lightning Flash while resisting full Devil rebirth. He possesses memories of anime/manga from his past life and unique knowledge of the crossover world, adopting the persona of a “considerate scumbag” with a cold, pragmatic edge toward enemies. He bears the “Little Aki” trait—a mysterious member tied to his Essence, coveted by Succubi—and dates Rias Gremory alongside the Takamine sisters, navigating his evolving power and identity amid supernatural politics.
• Shinra Tsubaki – Dark-blue-haired and refined, she serves as vice-president of the student council in a uniform befitting her status, childhood friend and “Queen”-type retainer to President Shitori Sona; a middle-class reincarnated devil with the Mirror Reflection talent and later the Demon Bloodline, she is an A-rank peerage member whose mana was significantly enhanced after encountering Aki, solidifying her role as both a strategic ally and loyal subordinate to Sona.
• Tsubaki – Shinra Tsubaki, Vice President of the Student Council and Sona’s Queen. A stoic Devil with black wings who wears a standard school uniform paired with a black lace bra and silk stockings, her glasses framing a serious, intellectual gaze. A master of privacy-bound magic, she aids investigations with razor-sharp analysis, masking deep jealousy of Aki’s time with the Occult Research Club—her hidden affection culminating in their first kiss. Though a distant senpai to others, she shares an intimate, unspoken bond with Aki, her composed authority concealing vulnerable, devoted emotion.
• Hamazaki Reina – Blonde hair, emerald eyes; wears a modern school uniform with a miniskirt and black silk stockings. As the Big Sister/Boss of Kuoh Private Academy’s trio, she commands Aki, now obedient, using Insight Eye to exploit his bloodline. Part of a four‑person group tied to Aki’s constitution, summoned by phone late at night, and one of his partners whose stimulation can cause loss of bladder control.
• Sasaki Yukina – Freshman at Kuoh Academy with long peach‑pink hair, purple eyes, statuesque athletic build, large chest, fair legs and white ankle socks. Red‑eyed, physically dominant, she wields Physical Activation to boost Aki’s strength and endurance, prefers close‑combat and is highly durable. Strongest of Reina’s trio, Aki’s long‑term partner, she tests him by knocking him out, supplies intel on Shinomura Yuki, and pushes honesty within Hamazaki’s group.
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Edited by Kanaa-senpai.
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