Crossover-Isekai 130

Chapter 130 Takamine Kasumi Returns


Edited by: Kanaa-senpai


 Unlike Aki, who had reached A-rank through Dual Cultivation¹, Amano Yuuma and the others had to master Intermediate Magic Power Extraction² to keep advancing.


 Fortunately, once they hit A-rank, going back to learn Intermediate Extraction was as easy as breathing.


 Aki’s situation was an outlier; his Martial Way³ and Dual Cultivation abilities caused his Mana to skyrocket so fast that Intermediate Extraction never even had a chance to be useful.


 Even now, learning Advanced Extraction would be a walk in the park for him, but since his Mana had already peaked at the summit of S-rank, it wouldn’t actually accomplish anything.


 His former Advanced Sword Zen skill had vanished entirely after he achieved his enlightenment of the world, and his melee combat had evolved into Taijutsu Mastery.


 In terms of raw skill intensity, even Basic Taijutsu Mastery was enough to utterly crush Advanced Close-Combat.


 Aki had siphoned Existence Erasure and Light Spear directly from Amano Yuuma.


 The Light Spear needs no explanation-it was similar to a Thunder Spear, just with a flashier look and a damage bonus against Stray Devils.


 Existence Erasure was a god-tier cheat against ordinary people, as it could wipe their memories of him entirely, essentially turning him into a “Transparent Man” at will.


 (Against transcendent beings, however, this skill is completely useless.)


 Additionally, as the girls entered the supernatural realm one by one and mastered Talents that suited them, Aki siphoned various other minor skills.


 The probability of a skill drop was low, but with such a high volume of extractions, they added up quickly.


 Aki knew their Talents intimately and pointed each of them toward their optimal Cultivation path.


 For Obata Yui, who possessed a Perception Talent, he had her focus on reconnaissance magic so she could serve as the team’s scout.


 The petite Sakagami Akino had a Tenacity Talent, so she took the vanguard route, focusing on body reinforcement magic.


 Of course, some Talents were rare, and Aki could only offer general advice, leaving the girls to figure out the specifics themselves.


 Shinohara Misaki’s Talent was one of those.


 Her Talent was called Spirit Pact, and the system description said she was an expert at learning and modifying Contracts.


 But the path of Contracts was too niche, so Aki could only suggest she form pacts with more Familiars to see if she could become a Magic Beast Tamer.


 Aki’s “Harem Reinforcement Plan” was finally starting to show results.


 An organization of supernatural girls led by Miyajima Sakura-with the Takamine Sisters as support and Hamazaki Reina’s group of four as officers-was already taking shape.


 Because Aki lived with the Takamine Family, their house became the official headquarters.


 The Miyajima Dojo served as the primary outpost, where Miyajima Sakura handled the coordination.


 Her most important job was scheduling the girls to take turns staying overnight at the Takamine house; there were so many of them that without a strict rotation, Aki wouldn’t have a single moment of peace.


 (Especially with the number of beauties constantly increasing…)


 The base the girls visited most was an apartment provided by that little rich girl, Kurumizaka Ruri.


 Everything from meetings and parties to ability practice happened there.


 Ruri had even gone so far as to renovate the entire place for them.


 She tore down walls, added extra seating, and expanded the kitchen and bathrooms just to make their gatherings more convenient.


* * *


 On January 3rd, the day after the New Year’s shrine visits, the Occult Research Club (ORC) headed back to the Underworld-everyone except Aki.


 Aki had originally wanted to follow Rias and see the Underworld for himself, but then Mother Takamine suddenly returned after being away on business for six months.


 Since winter break was short and Rias would be back soon after handling her family business, Aki decided to stay and greet the mature beauty who had raised him for nearly a decade.


 At 10:00 AM, Aki was helping Takamine Ayame clean while Takamine Sayuri was in the kitchen.


 Shhh-clack!


 The sound of the sliding door echoed through the foyer as Mother Takamine appeared, pulling an orange suitcase and carrying a pink bag.


 She was wearing a sharp professional suit, her light-brown, wavy hair braided back in a style that radiated “mature wife” energy, revealing a neck as elegant as a white swan.


 Her tight purple sweater was strained to the limit by her towering, snowy breasts-two heavy, succulent globes that seemed to defy gravity.


 Her slender waist looked as though it might snap under the weight it carried.


 Her rounded hips were wrapped in white fabric, shaped as perfectly as a full moon-large, firm, and perky enough to make anyone stare.


 Tapering down from those lush curves were long, shapely legs encased in black stockings so sheer they were like a second skin.


 This tall, seductive woman was the mother of the Takamine Sisters and the guardian who had looked after Aki for years.


 In terms of raw looks, Mother Takamine was only “upper-middle” compared to the other girls, but her status made Aki burn with a psychological urge for conquest.


 When this glamorous, mature woman appeared before him, he almost couldn’t resist reaching out.


 Steadying himself, Aki flashed a pure smile. “Kasumi-obasan, welcome home.”


 Kasumi froze; looking at the handsome, striking young man before her, her heart suddenly began to race.


 A faint blush touched her cheeks. “Who are you? Why are you in my house? Wait… are you Ayame’s boyfriend?”


 It had been six months, and since reaching A-rank, Aki’s transformation had been total.


 The people close to him had seen the gradual changes every day, so they didn’t think much of it.


 But for Kasumi, seeing this new Aki all at once made him a total stranger, even if he did look familiar.


 Aki just shook his head and kept smiling.


 ”Not Ayame’s? Then… is it Sayuri’s?”


 Kasumi was an extrovert who loved to tease, a trait Ayame had clearly inherited.


 ”I didn’t think Sayuri would be so bold as to bring a boyfriend home.”


 She reached out to pat Aki’s head. “Not bad, not bad at all. Sayuri has great taste. I approve of this marriage!”


 Hearing the commotion, the Takamine Sisters dropped what they were doing and ran to the entrance.


 ”Ayame, Sayuri, long time no see!” Kasumi said.


 ”Welcome back, Mother,” Takamine Sayuri said properly.


 Ayame skipped forward and tackled Kasumi in a hug. “Mom! You were gone so long! Did you bring presents?!”


 ”Alright, let go. You’re too old to be this clingy,” Kasumi teased.


 She looked around, puzzled. “Where’s Aki-kun? Is he not home?”


 The sisters looked at the smiling Aki and then at their mother, unsure how to explain.


 Just as Kasumi was about to press them, Aki finally spoke.


 ”Kasumi-mama, it’s been a long time.”


 ”Oh!” Kasumi blinked, then broke into a grin. “Quick on the draw, aren’t you? I just said I’d let you marry Sayuri, and you’re already calling me ‘Mom’?”


 She gave him a mischievous wink-a mature woman acting cute is a force no young girl can match.


 ”Actually, I’d rather you call me ‘Mother-in-law’!”


 Aki was momentarily dazed by her playful, seductive charm.


 ”By the way, I still don’t know your name. I can’t just call you ‘Sayuri’s Boyfriend’ forever!”


 Her voice brought Aki back to his senses. He suppressed a laugh. “Mother-in-law, my name is Uesugi Aki. I’m sixteen, and I’m a first-year at Kuoh Academy.”


 Kasumi’s eyes went wide, and her mouth hung open in total shock.


 ”A-A… Aki-kun?” she stammered. “Is it… is it really you?”


 ”That’s right, Kasumi-obasan. Mama. Mother-in-law. I’m your dear foster son.”


 —


 Summary:


 Aki consolidates his growing organization and siphoned skills while the ORC departs for the Underworld. Mother Takamine returns from her business trip to find a unrecognizable, handsome young man in her home. Her playful teasing leads to a shocking reveal of Aki’s true identity


 —


 Trivia:


 - Raynare’s current power level relative to Aki

 - The specific location of Ruri’s luxury apartment in Kuoh

 - The exact date of the business trip departur


 —


 Character Insight:


 Aki demonstrates a predatory psychological drive toward his guardian, Kasumi, fueled by her status rather than just physical beauty. Kasumi’s extroverted and flirtatious nature provides the source for Ayame’s own personality traits.


 —


 Glossary:


1 Dual Cultivation: An esoteric practice involving the exchange of energy through intimate contact to boost cultivation ranks.

2 Magic Power Extraction: The fundamental skill of drawing mana from the environment or internal reserves.

3 Taijutsu Mastery: A high-level proficiency in unarmed, physical combat techniques.

4 Existence Erasure: A skill that removes the target’s perception or memory of the user’s presence.

5 Light Spear: A projectile composed of holy light, highly effective against demonic entities.

6 Spirit Pact: A talent focusing on the creation and manipulation of supernatural contracts and familiar bonds.

7 Mana: The primary energy resource used for magical and supernatural abilities.

8 Martial Way: The philosophical and physical path of warrior training and internal energy growth.
,


Notes:


• Amano Yuuma – Yuuma Amano, also known as Raynare, is a fallen angel disguised as a high‑school girl to observe Aki. She has long black hair, white skin, slender waist, crystalline earlobes, and pitch‑black feathered wings. She wears a revealing black leather outfit covering only vital spots, black leather boots, and exudes a glamorous, provocative aura.

• Amano – Raynare, a fallen angel, masquerades as schoolgirl Yuma Amano in Kuoh Town. She has long black hair, a striking figure, and adopts the Amano surname to hide her true self. After reaching A-Rank with Aki she gains a black-belly nature and can instantly change clothes. The Amano name links her to the Fallen Angel faction and to Yuuma.

• Yuuma – Amano Yuuma, the fallen angel Raynare, is a striking, curvaceous beauty with long black hair and violet eyes. A former Grigori operative, she is a petite, tsundere warrior who wields light magic. After defecting to become a Pawn in Rias Gremory’s peerage, she now serves Aki with obsessive, yielding devotion, sharing a deep physical and spiritual bond through their frequent dual cultivation.

• Aki – A handsome, tall, and muscular sixteen-year-old freshman at Kuoh Private Academy, adopted son of the Takamine household, with sharp features, broad black bat wings, a barbed tail, and crimson-flecked eyes—once timid, now radiating dominant, predatory confidence. Master of Dual Cultivation, he channels immense stamina and life-energy transfer, mentoring Mittelt and Kalawarner while restoring the latter and plotting to steal Issei’s Boosted Gear. Romantically entangled with both of Kasumi’s daughters and Kasumi herself, he exudes a calm, weary sophistication amid family drama, admiring legs and feet, his “Great Dragon” symbolizing his physical and sexual dominance.

• Y – The first initial/part of the name Y Ddraig Goch.

• Yui – A student at Aisu Academy. One of the ‘heroines’ affected by the hypnosis incident.

• Sakagami Akino – A high school freshman described as pure and sweet, currently the final girl on Aki’s roster who provides him with the Toughness talent.

• Akino – Sakagami Akino, the top-rated first-year beauty and ‘Goddess’ of Aisu Academy. She possesses a specialized constitution involving fragrant, sweet bodily fluids.

• Takamine Sisters – Two sisters living with Aki who have recently begun Mana extraction.

• 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.

• Hamazaki Reina – Red‑haired, emerald‑eyed student, once top‑20 in her grade, now leader of the four‑girl squad that follows Aki. As Big Sister/Boss of Kuoh Private Academy’s trio she wears a modern uniform—miniskirt, black silk stockings—and wields an Insight Eye to command him, one of four constitution‑linked partners. Summoned late at night, her presence can trigger loss of bladder control.

• Miyajima – Family name of Sosuke, Tsubaki and Sakura.

• Takamine – The Takamine family name is shared by widowed matriarch Kasumi and her daughters Ayame and Sayuri, with Aki, their adopted son, now reshaping the household’s dynamics. Once governed by silent tradition, the home now thrives under a liberal, emotionally charged atmosphere as Kasumi’s long-suppressed desires surface, intertwining with Aki’s growing influence and the revelation of magic, transforming the residence into both a sanctuary and the headquarters of his evolving organization.

• Sakura – Miyajima Sakura, 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 surpassed him in strength and now lives with Aki, whom she treats as a younger brother despite his predatory nature. She manages his organization and practices Dual Cultivation with him, though he considers replacing her with the more socially adept Kasumi due to her superior talent and experience.

• 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. She has a slender waist, wears black pantyhose, is clingy and affectionate, teases Aki, offers her empty house, contributes Mental Resistance, is pragmatic and curious about mixed‑blood races, and is Aki’s classmate and cultivation partner who passed a test thanks to him.

• Rias – Rias Gremory, 17, tall curvaceous pure‑blood High‑Class Devil with long crimson hair, crystal‑like crimson eyes, snow‑white skin and jade‑smooth back; her stray‑devil wings flare when summoned. As Kuoh Town administrator and Occult Research Club president, she mentors Aki like a big‑sister Professor, leads his peerage, wields the Power of Destruction as Crimson Ruin Princess, and commands authority over reincarnation via Evil Pieces.

• Takamine Sayuri – Aki’s reserved, non-blood-related younger sister with short brown hair and gentle eyes, always dressed in a neat school uniform; excels at chores and possesses a ‘Flexibility’ talent, displaying submissive, masochistic devotion centered entirely on Aki, with maternal instincts and an unwavering desire to remain by his side, appearing in Takamine-ke no Nirinka – The Animation.

• Takamine Ayame – Eldest Takamine sister, tall and confident with long pink hair, slender waist, large breasts and an athletic build. Bold, open‑minded, a flexible swimmer and Aki’s host‑family older sister in Garden: Takamine‑ke no Nirinka. Playful yet resistant to her sister Sayuri, ultimately submissive. One of Aki’s non‑blood sisters, energetic, curvaceous and eager to learn magic.

• Sayuri – The younger Takamine sister, with a long light‑purple ponytail and a slender, provocative figure, wears a tidy school uniform. Polite and submissive to her mother, she handles all domestic chores, cooks for Aki, and shows masochistic devotion, eventually urging her mother to join his intimate circle.

• Ayame – Tall, confident eldest Takamine sister with long pink hair, athletic build, slender waist, and large breasts, she’s a popular swimmer at Aisu Academy and a fire-wielding magic user who acts as the primary catalyst for her mother’s transformation. Playful, mischievous, and extroverted—traits inherited from her mother—she calls Aki “Master,” clings to him with submissive devotion, and watches household dynamics with a knowing grin, openly supporting his advances toward their mother while teasing her younger sister Sayuri.

• Kasumi – Kasumi Takamine, a tall early‑forties widow with light‑brown wavy hair twisted back, porcelain skin and a voluptuous, mature figure, heads the Takamine household. Mother of Ayame and Sayuri, she is Aki’s long‑time guardian and returns from a six‑month trip, her shy demeanor masking latent sensuality and guilt‑laden desire for him, while secretly a magic‑gifted genius whose union with Aki awakens Mana Affinity.

• Uesugi Aki – Family name of Aki.

• Uesugi – Aki is slender, silver‑haired with calm, resolute eyes. He bears the Uesugi name, an A‑rank Stray Devil whose pragmatic, occasionally ruthless nature Kalawarner notes, linking his lineage to the Kurogane line and the Takamine family’s household dynamics.

• Raynare – A black‑haired, voluptuous A‑rank Fallen Angel, known as Lady Raynare and alias Amano Yuuma, sports obsidian wings and light spears. She shifts between an innocent schoolgirl guise and a lecherous cultivation form, leads a small cadre, and mentors Aki—her master‑disciple bond turning predatory. Irked by Mittelt’s sloth, she holds intel on a dangerous Sacred Gear and participates in a high‑stakes ritual to strip it.


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Edited by Kanaa-senpai.
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