Chapter 708: Sakura and Rin, Sisters Together Forever! The 18-Year Simulation!
"Hehehe... I want more... glug glug..."
"Mmph... I want more too! I'm so strong now! Master's mana is delicious!"
In the metaphysical space between dimensions, the scene was chaotic.
Ren looked down at the two small figures clinging to his limbs like koalas. He felt a mix of amusement and exasperation.
These two entities—Alaya, the Collective Unconsciousness of Mankind, and Gaia, the Will of the Planet—were acting less like cosmic forces and more like gluttonous children who had just discovered an infinite candy store.
They kept eating his mana even when their spiritual bodies were glowing from saturation. They even licked the excess Prana off each other's cheeks to avoid wasting a single drop.
"Sigh."
Now they clung to him, their small hands gripping his clothes tightly, unwilling to let go of their new power source.
Ren didn't know what to say. He had intended to subdue the Counter Force, not turn them into clingy pets.
"Alright, that's enough," Ren said firmly, peeling Alaya off his leg. "Both of you are leaking mana everywhere. If you can't eat any more, then wait for next time. Don't be greedy."
Gaia's crimson eyes lit up instantly. She looked up at him with adoration.
"Lord Ren… no, Master! Will you come back? Promise?"
Alaya, usually the colder of the two, also showed an expectant expression, her silver hair floating in the void.
"Master, if you come back, I… I will serve you better! I can summon those Heroic Spirits for you to play with next time! I have plenty of cute Sabers in stock!"
Ren chuckled and patted their little heads.
"I will come back," he assured them. "Although Sakura and the others have been cut out from the essence of this world by me—making them independent from your control—they will still live in this world. So of course I will come back to visit them."
"And besides," Ren added, a possessive glint in his eyes, "both of you now belong to me. I take care of my property."
"That's great!" Gaia cheered. "Next time Master comes, I'll give you a surprise! A really big one!"
...
Making the two Counter Forces his own.
Ren was probably the first entity in the multiverse to domesticate the Will of the Planet and the Will of Humanity so thoroughly.
After he opened a portal and left the Root.
Alaya, lying on the ground of the metaphysical space, burped softly and rolled her eyes with a cunning glint.
"It seems... I can give Master a surprise right now! Why wait?"
Gaia narrowed her lazy eyes, sensing a scheme. "What are you going to do, Alaya? Master said no trouble."
"Hehe… it's not trouble if he likes it," Alaya giggled. "He likes sisters, doesn't he? I saw his memories. I know what he wants."
...
[Location: Fuyuki City - Tohsaka Residence]
The large, western-style mansion was silent.
Rin Tohsaka sat alone in her room, hugging her knees. Her usually spirited twin-tails looked droopy.
She was very sad.
Her younger sister, Sakura, had been sent away to the Matou family years ago. She knew it was for the sake of preserving magecraft lineage, but she hated it. She hated her helplessness.
Even her mother, Aoi, was unhappy, though she tried to hide it.
"Sakura..." Rin whispered into the darkness. "I'm sorry. I'm a useless older sister."
[Do you want to see your sister?]
Suddenly, a devilish, tempting voice appeared directly in her ear. It wasn't sound; it was a thought implanted in her mind.
Rin pricked up her ears, jumping off her bed. She looked around nervously, her magical circuits flaring. "Who's speaking?! Show yourself!"
[You only need to tell me... do you want to see your sister? Do you want to save her?]
Rin hesitated for only a second. Her love for Sakura outweighed her fear of the unknown.
"Of course I want to! I want to be with Sakura forever! I want to protect her!"
"What exactly happened to Sakura? Is she okay?"
[Good. Let me show you everything your sister went through not long ago... and where she is now...]
A flood of images assaulted Rin's mind. The worm pit. The darkness. The pain. And then... the light. The man named Ren saving her.
Rin's eyes widened in horror, then relief, then determination.
[Go to her. Be with her.]
The floor beneath Rin glowed with a magical circle, and she vanished from the Tohsaka manor.
… …
[Location: Einzbern Castle]
"Do you want to marry your Ren-nii-chan?"
In the warm living room of the castle, Sakura sat playing with a doll. Suddenly, she heard a voice.
Sakura widened her eyes and looked at the silver-haired girl sitting across from her.
"Illya-chan, did you just speak?"
Illya shook her head in confusion, blinking her red eyes. "I didn't say anything, Sakura-chan. What's wrong?"
"Hmm… I… I don't know either." Sakura rubbed her ears.
[I can grant your wish. Do you really want to marry your Ren-nii-chan?]
The voice persisted. It was gentle, like a mother's lullaby.
Sakura thought to herself, blushing.
"Of course I do!" she thought loudly. "Ren-nii-chan is my hero. He saved me. I want to be his bride!"
"But… but Ren-nii-chan thinks I'm too small," Sakura lowered her head, looking at her childish body. "He said I have to wait ten years."
She really wanted to say that she was fine. She had endured so much pain; she was mature for her age.
But… that day she saw Ren-nii-chan... he was big. Very big. A giant.
[Hehe, then as you wish! Let us speed up the process!]
The voice laughed and disappeared.
"Sakura, you?"
Illya stood up, pointing a trembling finger. "Sakura! You're glowing!"
To Illya's astonishment… Sakura's body began to stretch.
Light enveloped her. Her limbs elongated, her face matured, and her curves blossomed instantly.
Rip!
Her child-sized clothes couldn't handle the rapid growth. The seams tore as her figure expanded into that of a voluptuous young woman.
At the same time.
When Ren returned here from the Root, stepping out of a ripple in space, he saw a… curvaceous, gentle-faced beauty standing in the middle of the room, clutching the shreds of her dress.
"Sakura?!"
"Ren... Ren-nii-chan?"
Sakura realized her vision had become higher. The furniture looked smaller. Her voice was deeper, richer.
She looked down, but couldn't see her toes.
Her view was completely blocked by a pair of surging, massive peaks that rivaled—no, surpassed—Ria's.
"Eh???"
Illya exclaimed, covering her mouth: "Sakura! You became a big sister! What happened to you?!"
"I… I…"
Ren had a guess. He felt the residual mana of the Counter Force.
But now was not the time to discuss these things. The poor girl was half-naked in the living room.
He swept up the grown-up Sakura into his arms—she felt heavier, softer, more womanly—and instantly teleported back to the master bedroom.
Irisviel and the others were still sleeping soundly, exhausted from the previous night.
After placing Sakura on the sofa and covering her with a blanket, he asked seriously: "Someone turned you into this, didn't they?"
Sakura nodded honestly, her face flushed crimson.
"A voice said it could help me fulfill my wish… so…"
"Alaya..." Ren muttered, massaging his temples. "You're quite the troublemaker."
He already knew what was going on.
She had just gained control of half the universe from Alaya, and she was already causing trouble. However, it seemed she did this to satisfy him, knowing his preferences.
And this wasn't just happening to Sakura. He sensed another presence arriving.
So Ren didn't bother to stop the transformation. It was already done.
"What wish did you make?" Ren asked softly, sitting beside her.
Ren's question made Sakura's face turn red like blood.
She looked up, her purple eyes now possessing a depth of maturity but filled with the same innocent adoration.
"I… I want to marry Ren-nii-chan. I want to help you... like Ria-onee-chan and the others do..."
As she spoke, she remembered that her wish had come true. She was an adult now. Her body was ready.
So could she…
She stared at the spot in front of her. She bravely extended her slender, elegant hand towards him.
Snap.
But Ren grabbed her wrist gently.
"Sakura," he said firmly.
This was like pulling up seedlings to help them grow. It wouldn't do. Her body was adult, but her mind was still a child who had missed out on her teenage years.
"Ren-nii-chan… can't I?"
Sakura's body trembled. Crystalline tears welled up in her purple eyes.
"Why? Ren-nii-chan, look at me! I can now! I'm big enough!"
She grabbed Ren's hand and desperately placed it on her chest, letting him feel the frantic beating of her heart.
"Sigh."
Ren sighed. The softness was incredible, but his conscience pricked him.
He leaned down and gently stroked Sakura's cheek, wiping away a tear.
"You've experienced too little; this isn't fair to you. You missed your childhood, your school days, your growth. So… let's experience more time together."
"Experience...?"
"Yes. A simulation. A life."
He snapped his fingers.
Snap!
The world around them dissolved. Time began to shift, guided by Ren's omnipotent authority over the domain.
In the next second.
Ren created a pocket dimension. A temporal loop.
He spent 18 truly pure years with Sakura inside that accelerated time.
It was a life they built together. He watched her go to middle school, then high school. He watched her learn to cook, to laugh, to make friends. He healed her trauma day by day, not with magic, but with presence.
Then he reconnected to this timeline.
Back to the present.
Sakura's temperament had completely changed.
The childish, insecure aura had faded. What remained was a truly mature, gentle charm—the Yamato Nadeshiko of his dreams. Her love for him hadn't faded; it had deepened, fermented like fine wine over 18 years of memories.
But more importantly.
Beside her, there was an additional person in the room.
A black-haired, twin-tailed beauty with fierce turquoise eyes, wearing a red sweater.
"Bastard Ren! Are you going to bully my sister?!"
Tohsaka Rin rushed in front of Sakura with a protective stance, arms spread wide.
She used her equally ample—though slightly leaner—body to shield Sakura from Ren's "clutches".
"…"
Ren's head was full of black lines.
Originally, he just wanted to spend 18 peaceful and pure years with Sakura in the simulation.
But Alaya, that meddlesome force, insisted on throwing this girl in too.
Sakura's older sister.
She was also pulled up by Alaya using the same method, aged up to match Sakura, and thrown into the simulation.
She appeared on Day 1 of the simulation, hugged Sakura, crying and shouting that she wanted to protect her purity from the "Evil Demon King" Ren.
She seemed to have seen what Sakura went through in the worm pit before Ren rescued her, so she felt exceptionally guilty and sorry for her sister.
But... Sakura felt that her sister was hindering her good fortune.
In these 18 years of simulated life.
There was no one else in that world. Only the three of them lived together.
Sakura always wanted to be intimate with him in various ways—sneaking into his bed, cooking aphrodisiacs, "accidentally" losing her towel.
Rin, however, wanted to stop it in various ways.
"No, Sakura! You can't enter a man's room at night!"
"Sakura! Put some clothes on!"
One wants to be taken. One wants to protect (but secretly wants to be taken too).
A guardian sister battle. Back and forth.
These 18 years were interesting, to say the least. Rin's tsundere nature slowly crumbled under Ren's teasing and care, until she was just as hopelessly in love as her sister, though she would die before admitting it.
But now... the time limit has come. The simulation ended. They were back in reality, retaining all memories and physical growth.
Ren had endured for 18 years. 18 years of holding back against two stunning sisters.
How can you not open the meat when it's served on a platter?
Ren moved faster than the eye could see.
He reached out, grabbed Rin by the waist, and pulled her over, pressing her down onto the sofa next to Sakura.
"Don't scream, Rin," Ren whispered into her ear, his voice sending shivers down her spine. "The cherry blossoms are blooming, and you... you can't run away either."
"Eh??? W-Wait!"
Rin screamed, her face turning atomic red. "I-I didn't agree to this! I was just protecting Sakura!"
But she didn't struggle.
She thought that if she turned her back to Ren, he would not be able to see her trembling eyes, her heart that was pounding out of her chest, and her blushing face that betrayed her true feelings.
Who made her also fall for the big pervert who accompanied her for the past 18 years? Who cooked for her, trained her magic, and tolerated her temper tantrums?
Together...
Isn't it also a fulfillment of her wish to be with Sakura forever? To share everything?
"Brother Ren..."
Sakura, seeing her sister captured, didn't get jealous. She smiled—a sweet, slightly dark, knowing smile.
"It seems that this time it's okay~"
Sakura stretched out her hand again. This time, there was no hesitation. She began to unbutton Ren's shirt.
This time there was no stop.
"Sakura, Rin," Ren looked at them both, his eyes darkening with desire. "What you have to endure next is much more terrifying than you think. I have 18 years of interest to collect."
"Well..." Sakura leaned in, kissing his jawline. "Sakura has been ready for a long time."
"I... I'm not afraid of you!" Rin stammered, closing her eyes but leaning into his touch. "Do your worst, you pervert!"
Sakura spreads her tall, elegant legs, inviting him in.
Ren has seen through everything. Tonight, the Tohsaka sisters would finally be reunited—in every sense of the word.
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