Crossover-Isekai 75

Chapter 75 The Target Appears


Edited by: Kanaa-senpai


 ”Ugh,” Aki grunted, tugging at his collar. “Senpai, wait here for a second. I’m going to go rinse off.”


 He stripped down with practiced efficiency, ignoring the heat of Miyajima Sakura’s bashful gaze as he walked toward the bathroom at a leisurely pace.


 (Just like they said… Uesugi’s body is incredible…)


 Sakura couldn’t help but steal glances at Aki’s naked form, her mind spiraling into a haze of intrusive thoughts. Her eyes trailed over the sharp lines of his abdominal muscles, drifting lower and lower.


 (Is that… what a d**k looks like…?)


 (It’s so huge, so thick… and he isn’t even hard yet…)


 Aki took a quick shower and returned to the room, only to find Miyajima Sakura¹ standing there with her uniform still perfectly in place. He felt a moment of hesitation. He couldn’t treat Sakura the same way he had handled Sakuramachi Touko or Miyuna. After a beat, Aki stepped forward and gently wound his arms around the girl’s slender waist.


 ”Miyajima… Sakura-senpai. Just relax. Leave everything to me.”


 Sakura’s face turned a violent shade of scarlet as she gave a tiny nod. “Mm…”


 She closed her eyes, her long lashes trembling like the frantic beating of her heart. Aki took her long, fair hand and led her to the bed. Sakura followed his lead, sinking into the mattress. Her full breasts strained against the fabric of her uniform, and from Aki’s vantage point above her, the view of her deep, snowy cleavage was intoxicating. Her tall, supple body gave a slight, restless writhe, her long thighs pressing together and rubbing in a subconscious attempt to soothe her mounting nerves.


 Aki leaned down, capturing her small, cherry-pink lips in a kiss while his hand expertly found its way to her rising peaks. As he deepened the kiss, kneading her soft flesh with practiced ease, Sakura finally began to let go.


 Aki was savoring the sweet taste of her as he prepared to dismantle her last defenses and begin the next stage of cultivation², but then his mental sense flared. A familiar presence was closing in fast. He pulled back, looking out the window. A familiar little black sphere was bobbing up and down in the brilliant moonlight.


 ”Miyajima-senpai, hold that thought.”


 Aki grabbed a towel from the floor and wrapped it loosely around his waist. Sakura panted, nodding shyly. Now that the little black sphere had manifested itself, she could see it clearly even without Mana. The irritation Aki felt at the interruption was quickly eclipsed by a surge of excitement as he processed the information the sphere brought.


 Persistence had finally paid off. After twenty-four hours of constant surveillance, the little black sphere had finally located Tanaka Hajime within Aisu Academy.


 ”Sakura-senpai, it looks like our cultivation session is going to have to be postponed.”


 Aki tossed the towel aside and pulled a fresh change of clothes from the wardrobe.


 ”The man targeting you has shown his face. Kuro says he’s currently in your school’s indoor gym.”


 Kuro was the nickname Aki had given the little black sphere—simple and to the point. The sphere had actually tried to protest, claiming it had a real name, but Aki had steamrolled over it. It eventually gave up and accepted the name; honestly, after hearing it enough, it wasn’t that bad.


 Sakura’s eyes were brimming with a soft, lingering affection. She clearly wanted to stay in this moment, but she knew better than to be a distraction. She sat up and straightened her rumpled uniform, adjusting her bra where it had shifted out of place over her chest.


 ”Uesugi-kun, are you going alone?” asked Sakura.


 Aki, already finished dressing, replied, “Yeah. Don’t worry, his ability is just a bit of a headache. His actual combat stats are practically zero.”


 ”Stay here tonight. If things go well, I might even be back before the sun’s up,” Aki said.


 Sakura’s face flushed again, and she gave a microscopic nod. Aki found the sight fascinating. This shy, delicate side of her was something the hypnotized Sakura in his memories had never shown. The contrast with the normally cool and collected Kendo beauty was a massive turn-on; it made him even more curious to see how the real her would act when things finally got heated.


* * *


 Kuro drifted through the sky while Aki sprinted below.


 Under the cold moonlight, two dark shadows flickered like ghosts through the silent streets. Aki was fast—blisteringly so—but running couldn’t compete with the convenience of flight. Usually, he didn’t mind, but when time was of the essence, the inability to move in a straight line was a massive pain. Plus, maintaining a full sprint was a constant drain on his stamina.


 Aki wiped the sweat from his brow. He needed a ride. Not just for emergencies, but to save energy during contract work. He remembered that Hyoudou Issei had started out doing contracts on a bicycle.


 (Actually, forget the bike. I hate Japanese bicycles; they’re eyesores. And if I get something custom and flashy, I’ll be a magnet for unwanted attention. A car is out, too—I’m not old enough for a license, and a car can’t weave through the narrow back alleys of the town.)


 (That basically just leaves a motorcycle…)


 (Ugh, if only I had Flight or Space Magic, I wouldn’t have to deal with any of this.)


 While lost in thought, Aki reached the gates of Aisu Academy. He stared up at the two-meter iron fence. Today was the day he finally became a trespasser. He leaped lightly, his hands catching the top rail. With a powerful pull of his arms and a flick of his wrists, he flipped over, rotating 180 degrees in mid-air. He let go, landing in a perfect crouch.


Thud.


 The soft sound of his landing echoed in the empty yard. Fortunately, there were no guards on patrol to witness his gymnastic feat. Once inside, Aki didn’t stop. Thanks to his Stray Devil lineage, the moonlight provided enough clarity that the night looked no different from high noon.


 He navigated the campus toward the gym and sent Kuro in first to scout. The sphere slipped through a high window. Three minutes later, the report came back: the target was on the stage, messing with some equipment. Aki thought for a moment, consulted with Kuro, and found a back door left slightly ajar. He pushed it open, slipping inside as the hinges gave a sharp, piercing creak.


 On the stage, Tanaka Hajime—who was busy calibrating the PA system—frowned and looked toward the noise. He had already hypnotized the local security and the teachers; nobody should be here. He waited, but when nothing else happened, he relaxed.


 ”Just the wind?” Tanaka muttered to himself.


 He didn’t even bother to go check. Even if it was a person, he figured he’d just have to say a few words and put them under.


 Seeing that Tanaka wasn’t coming his way, Aki stepped out from the shadows. He had hoped to ambush the man when he came to check the door—low risk, high reward. It would have saved him from testing whether his mental resistance could actually stand up to Tanaka’s hypnosis. Since the stealth approach failed, it was time for a frontal assault. Aki didn’t want to wait; time was an enemy. Besides, Tanaka was alone. He could afford to get a little reckless.


 He surged his Mana, activating Basic Physical Control and Insight Eye. Lightning crackled and coalesced in his palm, forming a brilliant, humming spear of electricity³. This was his trump card: Thunder Spear. With his current pool of Mana, he could only throw it three times.


 Aki started to move. He began with a slow stride that accelerated instantly, becoming a blur by the time he entered Tanaka’s line of sight. Seeing a black shadow rushing him at impossible speeds, Tanaka Hajime’s flabby body gave a violent jolt. His eyes, nearly lost in folds of fat, snapped wide as he opened his mouth to bark a command.


 ”Sto—ugh… gack…!”


 He didn’t get past the first syllable. A sharp pain tore through his throat as his words died into a gurgle of agony. Aki’s Thunder Spear had driven straight through Tanaka’s neck. Seeing the man silenced, Aki felt a wave of relief wash over him. He’d aimed for a headshot, but Tanaka’s single-word command had caused a split-second hesitation, throwing his aim off.


 Fortunately, Aki’s mental fortitude held. He had wavered for only a heartbeat before adjusting his strike mid-air. At that speed, the throat was the best he could do.


 This time, he hadn’t missed. The target was down.


 —


 Summary:


 Aki and Miyajima Sakura are interrupted during an intimate moment by the familiar ‘Kuro,’ who has located the antagonist Tanaka Hajime. Aki quickly shifts into combat mode, infiltrating Aisu Academy to eliminate the threat. The chapter concludes with Aki successfully impaling Tanaka through the throat with a lightning-based attack.


 —


 Trivia:


 - Aki’s ‘cultivation’ serves as a power-up mechanic common in crossover doujin tropes.

 - Aisu Academy is the setting where Tanaka’s primary victim, Sakura, attends.

 - Aki’s high mental resistance allows him to shrug off a hypnotic command that would incapacitate others.

 - The ‘Kuro’ sphere is a high-level reconnaissance tool with its own ego.

 - Hyoudou Issei (DxD protagonist) is referenced as a benchmark for devil contract work


 —


 Character Insight:


 Aki demonstrates a cold, efficient transition from desire to duty, showing his priority is removing threats over short-term pleasure. Sakura shows a vulnerable, genuine side of her personality that deviates from the hypnotic scripts Aki remembers.


 —


 Lore And Worldbuilding Context:


 The ‘Thunder Spear’ is likely a variation of the Lightning Spear (Kaminari no Yari) from traditional high-fantasy or DxD-adjacent power sets.


 —


 Glossary:


1 Miyajima Sakura: Aisu Academy student and Kendo practitioner.

2 Cultivation: A genre-specific term for dual-practicing or training through sexual/intimate acts to increase Mana or power.

3 Thunder Spear: A high-tier lightning magic spell with extreme piercing power but high Mana consumption.


Notes:


• Aki – Transfer student at Kuoh Academy, silver‑haired and sharp‑eyed, Occult Research Club member. B‑rank Stray Devil with dual‑cultivation, Insight Eye and Mana‑Lightning Flash. Dates Rias Gremory and the Takamine sisters, holds the “Little Aki” essence. Defeated Miyajima Sosuke, monitors Aisu Academy, bluffs his status with the Gremory Family, adopts a scumbag persona while growing Mana.

• 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, an upperclassman at Aisu Academy, is a tall, athletic kendo prodigy with the “Sword Heart” talent, wearing the school’s navy blazer and red hakama. Daughter of Sousuke, she sees Aki as a younger brother yet knows his predatory nature, and now stays with him after learning of the supernatural.

• Sakuramachi Touko – Sakuramachi Touko, a pure‑blood succubus masquerading as Aki’s classmate, has shoulder‑length bluish hair, an icy cool demeanor, striking beauty, and an eerie death stare on camera. A mental‑attribute mage, she rose from C‑Rank peak to B‑Rank via dual cultivation with Aki, wielding advanced massage and oral techniques.

• 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.

• Touko – Sakuramachi Touko, a pure‑blood succubus masquerading as Aki’s classmate, has shoulder‑length bluish hair, an icy cool demeanor, striking beauty, and an eerie death stare on camera. A mental‑attribute mage, she rose from C‑Rank peak to B‑Rank via dual cultivation with Aki, wielding advanced massage and oral techniques.

• Tanaka Hajime – An obese individual with a hypnosis Ability that allows him to control others through speech; currently at Aisu Academy.

• Hyoudou Issei – Issei Hyoudou is a brown‑haired, average‑built high‑schooler with a mischievous face. A shocked, lecherous student at Kuoh Academy, member of the “Pervert Trio,” who peeps on girls, is unlucky, and hosts the Boosted Gear.

• Issei – Issei Hyoudou, a brown‑haired, average‑built high‑school student with a mischievous face, is the shocked normal student caught in the crossfire and the potential host of the Boosted Gear. Known as one of the “Three Perverts” for his lecherous antics, he is a comedic pervert from High School DxD.


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Edited by Kanaa-senpai.
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