Chapter 78 The Effects of Cultivation
Edited by: Kanaa-senpai
Though her body remained limp, sapped of strength by the overwhelming stimulation she’d just endured, Miyajima Sakura managed a nod. She forced herself into the formal meditative posture she usually assumed before practice – despite being completely naked. To truly advance on the path of martial arts, one couldn’t rely on physical conditioning alone; the cultivation of one’s essence, energy, and spirit was just as vital.
Aki’s “Essence”¹ radiated a steady, pulsing heat from deep within her lower abdomen. At first, Sakura struggled to quiet her mind. Between the vulnerability of meditating in the nude and the lack of her trusty wooden sword, she felt profoundly out of place. Worse was the heavy, sloshing sensation in her womb – she was brimming with his seed, a feeling so foreign it made her skin crawl with a mix of shame and heat.
However, as the Essence began to circulate, a wave of warm, vitalizing energy surged through her. Sakura finally slipped into a trance. She could feel her fibers being reinforced, the micro-tears in her muscles knitting back together. Even the lingering ache between her thighs seemed to vanish under the soothing flow.
Aki had only provided two “bursts” of Essence, and since Sakura didn’t yet know how to actively circulate energy, she was merely reaping the passive benefits of their Dual Cultivation². The residual energy was mostly focused on physical recovery, but even this passive intake was transformative.
Thirty minutes later, Sakura exhaled and broke her trance. Her eyes snapped open, shimmering with a newfound clarity as she stared at Aki in genuine shock. Any lingering skepticism she held had been incinerated. In that short window, her physical capabilities had undergone a staggering leap.
The natural biological gap between men and women in terms of raw power and speed was a hurdle few could overcome. Sakura had never wanted to become a “Muscle Barbie,” so even after years of grueling discipline, her strength had only ever hovered around that of an average adult male. Now, however, she felt a terrifying surge of power. She was certain that even without her Kendo techniques, she could overpower a grown man through sheer, brute force.
The last time she’d felt such an explosive change was during the peak of her puberty in junior high. Back then, her appetite had been insatiable as her body transformed daily – her height shot up, and her breasts and hips filled out into the lush, rounded curves she carried today.
Catching the sparkle in her eyes, Aki smirked. “So, Sakura-senpai? How’s the progress? Feel any stronger?”
”I haven’t run a formal test yet,” Sakura whispered, still processing the sensation. “But… I’d estimate my raw strength has increased by at least fifty percent.”
She shared every detail of the sensation with him. Aki stroked his chin thoughtfully. (I figured as much. Since she doesn’t have an internal pool of Mana, the efficiency of the Dual Cultivation is throttled. Still, if it buffs her physical vessel, it should drastically accelerate her Kendo Cultivation.)
”Makes sense,” Aki said.
Sakura nodded. Her father, Miyajima Sosuke, had once explained that upon reaching the Grandmaster realm, one’s body begins to generate “Qi”³. To reach that pinnacle, one needed more than just a philosophical understanding of the blade; physical perfection was a prerequisite.
Qi was the byproduct of the perfect union between soul and flesh. If the body was weak, the spirit lacked vigor, or the insight was shallow, Qi would never manifest. The path of the warrior was arduous, but once mastered, a practitioner was virtually without weakness.
Aki found himself envying that path. His own Talent was heavily skewed toward close-quarters combat, and his physical and mental stats were already off the charts. But the birth of Qi required “Insight” – a deep, spiritual connection to a weapon or style. Whether it was the fist, the saber, or the spear, that spark of enlightenment was mandatory.
And that was where Aki hit a wall. His “System” was built on the mechanics of Dual Cultivation; his combat prowess came from raw instinct and street-fighting pragmatism. The abstract concept of the “Dao” or “Martial Insight” was a total mystery to him.
For now, he was stuck doubling down on his Mage path and physical reinforcements, but the dream of becoming a true Martial Arts Master remained buried in his heart. As a son of the Dragon Nation⁴, the fantasy of becoming a legendary Wulin⁵ expert was practically in his blood.
He hadn’t had the chance in his previous life. He wasn’t about to let it slip away in this one. Thanks to Sakura, he’d just unlocked the “Sword Heart” Talent. It was only at the Beginner level, but it was enough to reignite his ambition.
”Sakura-senpai, how about this? I’ll keep helping you with your ‘Cultivation,’ and in exchange, you teach me Kendo.” Aki leaned in, his voice dropping an octave. “And I don’t mean the flashy kind used for competitions. I want the real deal – the meditation, the spiritual bond with the blade, the true path of the sword.”
Sakura tilted her head, her expression a mix of confusion and intrigue. “I’d be happy to. But… didn’t you say you had no interest in Kendo before?”
”That was then, this is now,” Aki replied with a breezy laugh. “Besides, I realized how incredibly hot Sakura-senpai looks in her Kendo gi. I figured I should give it a shot.”
He wasn’t about to admit he was just min-maxing his new Talent.
Sakura flushed, giving him a coy, sidelong glance. “If it’s just the uniform you like… I suppose I could bring a fresh set for our next session…”
Aki blinked, then looked at the curvaceous Kendo beauty. Her eyes were hazy with lingering lust, and she was nervously fidgeting with her fingers. He realized exactly what she was implying.
”Sakura-senpai…” He let out a low, wicked chuckle as his hand slid up the silky, pale expanse of her inner thigh. “I think you’re the one who wants to try it on, aren’t you?”
Sakura’s entire body stiffened. The sheer embarrassment of being read like an open book made her skin burn. She didn’t know what had come over her lately; her mind was constantly drifting toward the gutter. “N-no… that’s not it…” she stammered, her voice failing her. “It’s… it’s for the sake of better Kendo Cultivation next time…”
”Oh? And tell me, is this ‘Cultivation’ of yours wholesome and proper?”
”Of cour – mmph!”
Aki silenced her excuses with a deep, invasive kiss. After a long moment of exploring her mouth, his hands moved to knead her heavy, soft breasts. “Sakura-senpai… can your body handle another round?”
Sakura’s thighs rubbed together instinctively, her “Flower Valley” already slick and weeping for the return of his heat. Her eyes glazed over, tiny pink hearts practically visible in her pupils. “Mmm… yes…”
”Then why wait for next time? Let’s get back to work.”
Aki grabbed her slender ankles, wrenching her shapely legs wide. Amidst Sakura’s breathless moans of delight, the two began a fresh cycle of Cultivation.
* * *
Monday.
Aki sat in his classroom, the history teacher’s voice droning on like a sedative in the background. Bored, he summoned his personal status panel.
> ‘[Name: Uesugi Aki]’
> ‘[Talents]:’ Intermediate Demon Bloodline, Physical Mastery (Beginner), Sword Heart (Beginner), Insight Eye, Mental Resistance, Mirror Reflection (Incomplete), Lightning Flash (Fragmented).
> ‘[Skills]:’ Magic Power Extraction (Beginner), Close-Quarters Combat (Beginner).
He stared at the list, calculating his next move. He had no idea what the power ceiling was for his “Cursed Loser Template.” He didn’t know how strong a high-tier “Yellow-haired Thug” or “NTR-thug” could actually get. Operating on the assumption that his enemies had no upper limit, he couldn’t afford a single day of stagnation. If he fell behind, the “narrative” would inevitably drag him back to his original, miserable fate as the cuckolded victim.
Tanaka Hajime was out of the picture. Over the weekend, in between his grueling “sessions” with Sakura, he’d updated the Miyajima parents and Himejima Akeno on the situation.
Even though the immediate threat to Sakura was gone, her father, Sosuke, was practically throwing her at Aki now. As for Miyajima Tsubaki… she was sharp. She knew exactly what had happened to her daughter the moment she saw her. Sakura had spent a night at Aki’s; the math wasn’t hard. Yet, Tsubaki continued to flirt and tease Aki in private. As long as nobody said the words out loud, she could maintain the delusion that she wasn’t “competing” with her own daughter for the same man.
As for Akeno… Rias Gremory was still MIA, busy with whatever demonic politics required her attention. Akeno hadn’t taken back the magic circle Aki had been given. Instead, she’d simply warned him: starting next week, whether Rias was back or not, the “Contracts” would begin.
Aki closed the panel, his plan solidified. First, Aisu Academy. Now that the biggest NTR threat was neutralized, the school was a goldmine of heroines waiting to be tapped. Second, Kendo. He’d make time every day to hit the Miyajima Dojo, let Sakura train him, and hopefully force an “Insight” breakthrough.
(Actually…) he thought, leaning back. (If it weren’t for the fact that Miyuna and Tsubaki would probably pounce on me the moment I walked through the door, I’d probably stay at the dojo all day.)
—
Summary:
Aki and Sakura engage in further Dual Cultivation, leading to a massive 50% increase in Sakura’s physical strength. Aki realizes his limitations in achieving ‘Qi’ through traditional martial arts due to his lack of natural ‘Insight.’ He decides to utilize Sakura to train his new ‘Sword Heart’ talent while navigating the complex sexual tensions within the Miyajima family.
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Trivia:
- Aki is originally from ‘Dragon Nation’ (China), explaining his Wuxia obsession.
- Qi is defined as a union of spirit and flesh, requiring physical perfection first.
- Tsubaki (Sakura’s mother) is fully aware of their relationship but chooses to ignore it to maintain her own flirtation with Aki.
- Akeno’s ‘Contracts’ are the next major plot hook starting on Monday.
- The ‘Cursed Loser Template’ is Aki’s internal term for his original role as an NTR protagonist
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Character Insight:
Aki shows a calculated, survivalist mindset, viewing interpersonal relationships as ‘resources’ to avoid his original narrative fate. Sakura is becoming increasingly addicted to the physical and power benefits of Aki’s Essence, compromising her traditional martial dignity.
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Lore And Worldbuilding Context:
The author utilizes typical ‘System’ novel tropes (LitRPG elements) to quantify character progression while weaving in Xianxia concepts (Qi, Cultivation).
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Glossary:
Notes:
• Miyajima Sakura – Upperclassman Miyajima Sakura, a striking kendo prodigy with “Sword Heart,” studies at Aisu Academy and now at Aie Academy. Living with Aki—whom she views as a younger brother despite his predatory nature—she is brave, romantically sensitive, a former Kuoh student, a club beauty targeted by Tanaka Hajime, and unaware of the supernatural.
• Miyajima – Family name of Sosuke, Tsubaki and Sakura.
• Sakura – Sakura Miyajima, a third‑year Aisu Academy student and kendo prodigy with the Sword Heart talent, wears a navy blazer and red hakama. Daughter of Sousuke, she treats Aki as a younger brother despite knowing his predatory nature, now lives with him after discovering his supernatural side, and they practice Dual Cultivation together.
• Aki – Silver‑haired, sharp‑eyed transfer at Kuoh Academy, B‑rank Stray Devil and Dual‑Cultivation peer. Works a contract for Himejima Akeno, dates Rias Gremory and the Takamine sisters, holds “Little Aki,” defeated Miyajima Sosuke, monitors Aisu Academy, bluffs his Gremory status, adopts a scumbag persona while growing Mana. Possesses intermediate demon blood, special nature, transcendent abilities, high soul strength, mental resistance.
• Miyajima Sosuke – Tall, disciplined kendo master in his late 40s, wearing a crisp white keikogi and hakama, he leads the Miyajima household with quiet authority. A devoted father to daughter Sakura, he balances protective instincts with a gentle smile. Near B‑rank, he’s approaching Grandmaster status, aware of supernatural hints but lacking deep technical insight.
• Uesugi Aki – The protagonist, a junior to Miyajima Sakura, possessing a ‘System’ and demon bloodline.
• Himejima Akeno – Akeno Himejima is a tall, graceful senior of the Occult Research Club, wearing the school uniform. She has long black hair, an elegant mature beauty, a large bust, and wields golden lightning. As Rias Gremory’s trusted retainer and confidante, she serves as Aki’s master, giving him a surveillance familiar and overseeing the cleanup of his clash with local punks.
• Tanaka Hajime – Tanaka Hajime, an obese student at Aisu Academy, once possessed a hypnosis ability that let him control others through speech; he is now referenced as a predecessor to the current antagonist.
• Himejima – Akeno Himejima is a tall, graceful senior of the Occult Research Club, wearing the school uniform. She has long black hair, an elegant mature beauty, a large bust, and wields golden lightning. As Rias Gremory’s trusted retainer and confidante, she serves as Aki’s master, giving him a surveillance familiar and overseeing the cleanup of his clash with local punks.
• Tanaka – Tanaka Hajime, an obese student at Aisu Academy, once possessed a hypnosis ability that let him control others through speech; he is now referenced as a predecessor to the current antagonist.
• Akeno – TIMEOUT: No response (20.0s) – Unknown error
• Miyajima Tsubaki – A poised woman in her late 30s, dressed modestly, she is the wife of Miyajima Sosuke, mother of Sakura, and a member of the Miyajima household present at the meeting, currently under hypnosis that heightens her sexual desire.
• Tsubaki – Shinra Tsubaki, Vice President of the Student Council and Sona’s Queen, is a stoic Devil with black wings, clad in a standard school uniform, black lace bra, and silk stockings, her glasses framing a sharp, 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 distant to most, she shares an intimate, unspoken bond with Aki, her composed authority concealing vulnerable devotion. As Sousuke’s wife and Sakura’s mother, she outwardly flirts with Aki, blending maternal warmth with seductive charm, her dual roles weaving tension beneath her polished exterior.
• Rias Gremory – Rias Gremory, a pure‑blood high‑class devil, sports striking crimson hair, blue eyes, a curvy elegant figure in the Kuoh Academy uniform, and a large bust. She heads her household’s local affairs, rules the school’s hidden hierarchy, and wields top‑level demonic power.
• Rias – Rias Gremory, 17‑year‑old pure‑blood High‑Class Devil and President of Kuoh Academy’s Occult Research Club, is the authoritative Crimson Ruin Princess with long crimson hair, crystal‑like crimson eyes, demonic wings, and an elegant school‑uniform figure. Determined and observant, she fiercely protects her peerage, mentors Aki as a big‑sister, oversees his training, and is frustrated by her inability to reincarnate him, driving her to meticulously conduct the ritual as both leader and guardian.
• Miyuna – A late-twenties kendo instructor and receptionist at the Miyajima Dojo, she possesses a toned, athletic build honed by martial arts training and exceptional stamina. Infatuated with Aki after their encounter, she harbors a predatory romantic interest, masking her intensity with professional poise. This is the first time she’s brought a man—Aki—to her apartment, marking a bold, personal breakthrough after years of reserved, office-lady decorum.
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Edited by Kanaa-senpai.
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