Crossover: I Took In a Runaway High School Girl

Frieren and Fern quickly immersed themselves in the internet, their eyes gleaming with boundless curiosity. For two individuals hailing from a world of fantasy magic, everything here was brimming with startling novelty, as if every pixel on the screen was a new spell they had never encountered. Be it the cold gleam of electronic equipment, the magic-less roar of cars speeding by, the haughty skyscrapers towering above, even the food, despite lacking the special effects of magical ingredients, tasted extraordinarily delicious—full of new, mouth-watering expectations.

Of course, they realized that some fried foods, while delightful, were not good for the body in the long run. On second thought, their previous world was indeed more suitable for them; after all, they had lived there for many years. Frieren and Fern were also accustomed to being mages, roaming freely, accepting commissions from villagers, and earning rewards from adventures. In this world, they had to rethink their future direction. It was impossible to openly accept commissions with their magic powers; that would attract too much attention. Magic power had to be stored, a secret hidden deep within, only for emergencies.

Renji Kamisaka arrived at Shiina Mahiru's side. His footsteps echoed faintly in the third-floor corridor as he approached Mahiru's room, as usual. After knocking a few times without an answer, he could only push the door open and enter.

A small smile touched Renji's face. Fortunately, after several lessons, Mahiru no longer left her room in an unrecognizable mess. However, don't expect her to tidy her own clothes. Just look, the clothes she changed out of yesterday were still casually lying in the basket in the bathroom. Renji walked closer, and the corner of his mouth twitched in amusement. Beside the bed, a crumpled pair of underwear lay quietly there.

"So, she's sleeping naked again?" Renji murmured to himself, his tone a mix of weariness and amusement. Mahiru's future was truly worrying. It was hard to say what this girl would become without someone looking after her. Perhaps this is the price to pay for being single-minded and a genius painter, he thought, sighing resignedly.

"Mahiru, wake up," Renji said softly, his voice like the whisper of the morning breeze. He leaned down, raising his hand to pinch Shiina Mahiru's smooth, mochi-soft cheek. The girl made a cute sound, like a waking kitten, slowly opening her beautiful eyes, and staring at him with her characteristic blank gaze, full of pure confusion. She sat up unconsciously, and her blanket slipped from her body, revealing skin as white and translucent as another work of art, as perfect as her paintings. Renji Kamisaka couldn't help but blush.

"Mahiru, you can't be that helpless," Renji said, trying to control himself and the flush on his face. "You can't show your body to men."

"It's okay, Renji... is the owner," Mahiru replied innocently, her voice slightly hoarse from sleep, without a trace of shame.

"I'm also a man! I really don't know what to say to you," Renji sighed, an apparent distressed expression on his face. He pulled a clean pair of underwear from the drawer and handed them to her.

Shiina Mahiru took her underwear. She put them on her legs seriously, without the slightest embarrassment, as if it were the most natural thing in the world. Then she tilted her head, her beautiful eyes blinking, and looked at Renji cutely. "Renji, are you angry?"

"I'm not angry, I'm worried," Renji sighed again, gently hugging her small body, and caressing her golden hair, as smooth as silk. "I'm certainly happy to see Mahiru's body and to see Mahiru so helpless against me." Renji paused, his gaze softening, filled with deep tenderness. "But I'm worried Mahiru will always be helpless. I don't want other men to see Mahiru helpless."

"No." She stretched out both arms to hug Renji's waist and rubbed her cheek against his chest, as if asserting an invisible boundary that only she understood. "Mahiru is only helpless against Renji."

Renji Kamisaka was slightly touched by the innocent and naive confession. He lowered his head and kissed her forehead, then asked, "Why? Mahiru, besides the reason of being the owner, why is Mahiru helpless against me? We've only known each other for a few days."

Shiina Mahiru thought for a moment, her beautiful eyes blinking, processing the question. "Because Renji gave Mahiru a Baumkuchen."

Renji Kamisaka's face instantly darkened, his expression a mix of shock and amusement. "So, whoever gives you a Baumkuchen is your owner?" he asked, trying to suppress a laugh.

Mahiru puffed out her cheeks, a little sulky. "Renji is really stupid!"

"Wow, it's so weird for you to say that!" Renji was a little surprised by her blunt response.

"Hmph, stupid," she said again, raising her hand and holding Renji's cheek, letting their foreheads touch, her gaze fixed. "Listen carefully." She stared deeply into Renji's eyes, an unexpected intensity in her innocence. "Mahiru's owner is only Renji."

Renji Kamisaka couldn't help but ask, "What about Rita?"

Shiina Mahiru said cutely, "Rita is the former owner, and now she is a friend." She leaned closer, whispering. "There is only one owner."

Renji didn't expect Mahiru to be good at making people happy like this, without realizing it. His heart instantly swelled with joy. "Then this is the deal. Mahiru can only be helpless against me, and only I, a man, am allowed to see her body."

"Well, only for you," Mahiru nodded obediently, a faint smile on her lips.

"Hey, it's time to wake up, little Mahiru."

"Renji, clothes." Mahiru pointed to the pile of changed clothes in the basket, as if it was Renji's duty.

"Can't you try to get them yourself?" Renji asked, suppressing a smile. But the girl pouted. "Mahiru already knows how to wear them."

Good grief. You're avoiding the main point, aren't you? Renji thought, sighing in amusement. She said she knew how to wear them, but she didn't say she knew how to get them. He guessed he had to choose. No big deal, just think of it as changing clothes for a very precious doll. And he only needed to choose the clothes, and Mahiru would change herself. She behaved very well, she knew how to wear clothes.

After changing into her school uniform skirt, Renji took Mahiru's small hand, washed her face, brushed her teeth, and then led her downstairs. After escorting Mahiru to the school gate, Renji Kamisaka then rushed to the train station. This time, they had to add Mai Sakurajima to their commute mix.

Inside the crowded train, Renji Kamisaka held Sumireko Sanshokuin on his left and Shiina Mahiru on his right, shielding them from the morning rush of passengers. Mai Sakurajima, standing nearby, looked visibly displeased, her aura slightly piercing amidst the crowd. Renji felt something being added to his foot. Looking down, it was Mai Sakurajima's slender calf, wrapped in black silk stockings. She was stepping on his small black leather shoe, inadvertently pressing on Renji's foot with subtle pressure.

"Uh, Mai-senpai, your foot," Renji tried to get her attention, a little surprised.

"Yes. What is it?" Mai folded her arms across her chest, staring at him with sharp, squinted eyes, stepping on his small leather shoe, and exerting a little more force, as if testing the limits of his patience.

"No, nothing. I'm happy you're stepping on me," Renji replied casually, a faint smile on his lips.

"Are you a masochist?" Mai stepped back two paces, feigning disgust, but her cheeks were slightly red, betraying a hint of her embarrassment.

Renji smiled and said nothing, letting the silence speak. After leaving Sakurasou, others could no longer see Mai Sakurajima, but she still existed for Renji, Sumireko Sanshokuin, and Shiina Mahiru. Renji wasn't angry when he was stepped on by his senior. Because if he didn't care, how could Mai Sakurajima express her dissatisfaction with such a small action? he thought. Perhaps Mai was angry at his unpredictable nature. But Renji Kamisaka had no plans to change.

After getting off the train, Mai Sakurajima left with Sumireko Sanshokuin. The senior probably had something to say to Sumireko, Renji thought. He didn't plan to interrupt their communication.

Upon reaching the school gate, Yukinoshita Haruno stepped out of a private car parked nearby, with an unmistakable elegant aura. "Hi. Good morning, Renji-kun, and Shiina-san."

"Good morning, Miss Yukinoshita, but... why the junior?" Shiina Mahiru responded politely, then asked again, a little confused.

"Because I'm also a Soubu High School graduate," Yukinoshita Haruno smiled and approached, raising her hand to link one of Renji Kamisaka's arms. The soft touch brushed his arm, accompanied by Haruno's captivating, distinctive scent. Renji blushed slightly. If they were alone, he wouldn't be able to control his anger just because of Haruno's proximity, Renji thought.

"Can I borrow your boyfriend for a moment, Mahiru~?" Haruno asked, smiling playfully at Mahiru, her gaze hinting that she knew more than Mahiru realized.

"Well, Renji isn't my boyfriend..." Shiina Mahiru wanted to be firm, but she saw Haruno smiling, as if she saw everything, and her expression softened. She sighed helplessly, "You two talk, I'm going to class first." Mahiru turned, leaving them both with quick steps.

Renji Kamisaka was pulled into the car. Yukinoshita Haruno then released his arm and said with a smile, "You have a way, junior. You've successfully charmed Shiina, and she has completely accepted your steadfastness."

"Of course, after all, I'm very sincere," Renji retorted, a faint smile on his lips. "Haruno-onee-san, I don't intend to deceive anyone. I just want to live happily with the people around me."

"If you regret marrying, remember to tell me as soon as possible," Haruno said, her tone slightly teasing, her eyes winking.

"Pfft, if you want, I won't give up," Renji retorted, a little mockingly.

"And this is my mother's decision. The probability of me refusing is very small."

Renji Kamisaka said seriously, "If Haruno-onee-san is willing, I can help you."

Yukinoshita Haruno felt warmth in her heart and suddenly leaned her head on Renji's shoulder. "I think I understand why Shiina-san is obsessed with you."

"Because I'm very handsome?" Renji asked, raising his eyebrows.

"You are indeed rude and shameless, but you are very handsome," Haruno chuckled. "If an ordinary person told Miss Yukinoshita that he wanted to have a harem, would it be an axe, or a battle-axe?" She laughed, "Is it both or are both axes?" Haruno grinned, staring at him sharply. "How much do you want to stab me?"

"Pfft, just kidding, I won't let you get stabbed," Haruno poked Renji's cheek playfully, then took out a folder from the side and handed it to him. "Here, the distant relative IDs you asked for."

"These cards have the stamps of congressmen and various officials, and can be used to prove your identity wherever you go."

"Thank you, Haruno-onee-san." Renji Kamisaka said happily. Haruno-onee-san is so efficient. This is simply a synonym for a good wife, he thought.

After thinking for a moment, he took out a stock document from his bag and handed it to her. "This... SAO Virtual Reality Game Company shares?" Haruno read the document title, her eyes wide with shock. "That name is actually yours? Are you kidding me?"

"What do you think?" Renji Kamisaka raised his eyebrows proudly.

"So, what you mean for me is..."

"Of course, we work together. This is all yours. If you make money in the future, just give half of it to me."

Yukinoshita Haruno rolled her eyes, a small smirk on her lips. "You're a hands-off boss and you still want half. You're very bold." She grinned wider. "Who are we? What's yours is mine? What's mine is still mine." She poked a finger, threateningly. "I want to hit you." Haruno extended her finger and pinched him playfully.

Renji Kamisaka smiled and boldly hugged Haruno's slender waist. He felt Haruno's soft body tremble in momentary surprise, then relax in his embrace. So, he said softly, "I'm kidding. This is for you." He looked at Haruno with a sincere gaze, reassuring her. "Although you said you want me to marry into your family, I want to marry every girl I like." Renji smiled faintly, his gaze distant. "If I have enough money, I can even establish my own country." He then looked at Haruno. "Haruno-onee-san, do you want to buy the Yukinoshita family?"

Yukinoshita Haruno laughed, a smile blossoming on her face, imagining the possibility. "You're so bold. If my mother knew about that, I don't know what would happen." However, a flicker of determination appeared in her eyes, burning brighter. "However, it would be interesting to use my own power to buy the Yukinoshita family from my mother."

"Then, I'll leave it to you." Renji Kamisaka said, leaning in and kissing her cheek. He was indeed like that. Haruno was willing to sacrifice for him, and he was willing to help her achieve her dreams.

If possible, Yukinoshita Yukino might not want to be the perfect socialite she was now. Every day, she had to face others with a forced bright smile, whether she liked them or hated them, she had to think carefully about every word to interact with them, which would exhaust her soul. Yet she was the eldest daughter of the Yukinoshita family. Even her father was ordered around by her mother since he was a child. At home, her mother was the ruling class of the Yukinoshita family. And she, Yukino, and her father were the ruled class. Haruno was the controlling sister. So she tried her best to prevent Yukino from living a life like hers.

And Renji Kamisaka gave her a new possibility. That is, by using the shares of the game company to depose her mother from the throne and control the Yukinoshita family. Don't underestimate Akihiko Kayaba's game company. This was a virtual reality game supported by many countries, with unlimited potential. It was said that the game had been developed to a certain stage... As a chaebol (conglomerate), the Yukinoshita family would certainly go to witness it. Haruno didn't ask Renji how he got the game company shares. She kissed his cheek happily and let him go.

Renji Kamisaka waved at her from the car and turned to walk towards the classroom. Professional people do professional things. The shares and dividends of this game company might be in his hands, but in Yukinoshita Haruno's hands, it could multiply, reaching its maximum potential. And, since it was already confirmed that he would marry Haruno, then Haruno was a part of himself. Renji Kamisaka would bring her home sooner or later. And his sister-in-law, Yukinoshita Yukino. Renji Kamisaka would definitely not let Yukino go. The dream of slamming his sister-in-law, Yukinoshita Yukino, against the wall would appear in his mind from time to time. He thought that he must achieve those ten things if he had the chance.

Enjoying the story? You can read 7 chapters in advance on p@treon/Rzzzy!