At lunch break.
The classroom was noisy. Several female students approached Rin's desk who was tidying up her books.
"Tohsaka-san! Today we want to try the cafeteria in the next building. They say there's a special omurice menu. Want to join us for lunch?"
One of her classmates asked enthusiastically.
Rin smiled formally, "Ah, thanks for the invitation, you guys. It sounds really good. But I'm sorry, I can't join you for lunch today. Not only that, I've brought a bento from home."
"Ehh, too bad. If we may know, where are you having lunch?"
"This..." She was a little embarrassed to tell the truth and said, "I'll be having lunch with my sister, she's a first year student."
That was a lie.
In fact, she wanted to find Eiji and have lunch with him while asking why he was a teacher at her school.
"Tohsaka-san, you have a sister!?"
"And she's a first year student?"
"She must be very pretty like you!"
The girls in the class were now talking excitedly about her younger sister.
Rin quickly got up from her seat and said she had to go now. They didn't stop her of course.
But in the hallway, a boy chased her and as she descended the stairs, he called out to her.
"Rin Tohsaka, wait a minute!"
"Hm?"
Rin looked back and saw her classmate whose name was Shinji Matou.
Because of the things the Matou family had done to Sakura, she frowned and did not have a good impression on him.
However, she did not show it clearly and put on an indifferent face.
"What's wrong, classmate?"
"You should remember my name, right? I'm the heir of the Matou family, Shinji Matou. I come from the same family that once adopted your younger sister."
Shinji introduced himself proudly.
His smile was slightly lopsided, he was basically making a villain expression.
And yes, he knew about Sakura. Before his grandfather, Zouken died. The Matou family had adopted a girl from the Tohsaka family.
Her identity was none other than Rin's younger sister.
"Oh." Rin replied flatly. "So, what does the Matou family heir need from me? Don't waste my time and tell me quickly."
"You..." Shinji's face darkened, his expression ugly. The way Rin looked at him and spoke to him triggered his inferiority complex. His tone of voice became sharper and envious. "Rin, don't think you're the greatest, the most talented, when you know nothing about my true power!"
"Huh? What are you saying? By the way, don't call me by my first name, Matou. I don't want others to misunderstand that we are close to each other."
Rin shook out her twintail hair with one hand, and made a disgusted expression while holding her bento with the other.
What was wrong with this boy from the Matou family?
She had never offended him, but he took the initiative to find trouble with her.
Not only that, in class... Don't think she didn't notice other than looking at him with a hostile gaze.
He often glanced at her with lewd gazes many times. However, the other boys also did the same.
It was natural and she could still tolerate them. Not that she was narcissistic, but Rin realized that she was the prettiest girl in the class, especially with Ishtar living inside her.
However, she had no interest in the boys in the class including Shinji.
{Yes, girl. Ignore the other men, only a man like Eiji is worthy of us.}
Rin felt embarrassed.
'Us? Ishtar, don't take me with you!'
{What? Don't think I don't know you like Eiji. There's no need to be embarrassed, even a Goddess like me—)
'No, I didn't!'
{What about the kiss you gave him this morning?}
'That was... It was just to say thank you.'
Rin replied weakly.
Ishtar rolled her eyes.
Her host was being dishonest.
What was a girl like her called?
Ah, it's a tsundere.
Still, how would she react if she knew her body had been used to do many perverted things?
Ishtar was suddenly a little aroused, she couldn't help but recall when Eiji's big cock pounded her and Rin's butt holes simultaneously.
Other people didn't know, but last night. She used Rin's body to sleep with Eiji. Or rather— she, Aoi and Irisviel had a foursome.
Eiji had cum inside them many times.
That was why even though Rin was planning to eat lunch, she was actually not that hungry at all.
Her stomach was still quite full.
"Enough!" Shinji clenched his fists, his anger quickly mounting. "Listen carefully, Rin Tohsaka. I will prove who is the strongest in the Fifth Holy Grail War. I have my own Servant!"
Rin was surprised but remained calm. "Is it okay to tell me that you are also a master? Don't tell me you're just overconfident."
Shinji placed one hand on his chest and pointed at Rin. "I'm confident, what's wrong with that? Heir to the Tohsaka family, are you willing to bet with me?"
"No, that sounds like a nasty deal. Let me guess, if I lose... You want me to be your girlfriend or something?"
Rin said her guess.
Shinji was surprised, "How do you know?"
"So it's true?" Rin's disgust was evident on her beautiful face.
Shinji pretended to cough to hide his embarrassment.
In his heart, he admitted that although he hated Rin and envied her for her talent as a magus.
He also lusted after her.
When he first saw her transfer to this school, he was mesmerized by her beauty and wanted to possess her.
"That's right." Shinji did not deny and flicked his bangs, he thought he was very handsome now. "Rin, each of us is the heir of a respected family in the magus world. Our status and backgrounds are equal, we are destined for each other. When I first saw you, I liked you too."
"I'm sorry, but I don't like you and there's no way for us to be together. Oh, and you think we're equal? You're overestimating yourself, Matou."
"We are not equals... As a Magus, you are far inferior to me. And your talent... I don't know how you became the heir to the Matou family with your below-average talent."
"Come to think of it, how did you even become a master? I don't sense any magical circuits from you. You're just an ordinary person."
Rin refused without hesitation and even criticized him.
Shinji was stunned, his body trembled and a feeling of humiliation rose in his heart.
Rin's words no doubt hurt his pride.
Although it was true, he had not thought of the magical circuit and could not generate mana from his body.
In a normal case, he would not be able to become a Master and not even be able to summon a Servant.
However, his grandfather's relic, Zouken overcame that problem. He used a certain method to become a Master in the Holy Grail War.
"The power of the Matou family is not as simple as you think! I, Shinji Matou will win the Fifth Holy Grail War! I'm the one who will get the Holy Grail, not you and the other masters! And when I come to power, you will regret having underestimated me!"
Shinji avoided the topic of his magical talent.
Rin shook her head, "A daydream. The Holy Grail War is not the plaything of elementary school kids like you. Now, get lost. I have more important things to do than listen to you ramble on."
She turned around and resumed her steps without looking back, leaving Shinji standing angry and annoyed behind her.
In the teacher's office.
"Eiji, I mean Eiji-sensei—"
Rin's words were cut off as she walked in and looked around to find the person she was looking for. And sure enough, she found Eiji sitting at a desk by the window.
It was somewhat hidden from the other teachers' tables.
But he froze, Eiji wasn't alone. There was a beautiful girl who was eating lunch with him and talking and laughing with him.
She felt sour.
"Sakura, why are you here?!"
"Rin, it's good that you came too. Let's eat together." Eiji shamelessly said to the girl who had just arrived.
With the manipulation of reality, he created a scene where female students wanting to have lunch with their teacher was a natural thing.
So, none of the other teachers in the office noticed them.
Sakura smiled gently. "Onee-chan, what a coincidence. You seem to have the same idea as me."
"I-I..." Rin wanted to argue because she was a tsundere, but she walked over and immediately sat on one of the empty seats. "I actually came here to ask why Onii-chan is a teacher at this school. But since you're also having lunch here, Sakura. Of course, I won't refuse."
"....." Eiji and Sakura didn't say anything.
They weren't even surprised by her tsundere words.
"Say something!" Rin complained with a slight blush on her cheeks.
Eiji swallowed the rest of Aoi's homemade sandwich in his hand before saying, "Well, I became a teacher at this school just because I thought it was interesting, Rin."
[That way, I can also keep an eye on protagonist Shirou and villain Shinji from a close distance.]
They've long known the boy named Shirou is the protagonist.
But he also goes to school here?
No, what surprised Rin more was that Shinji had a villain identity in the original work.
No wonder he was so annoying and made her want to beat him up.
"I see. Do whatever you want."
Rin opened her bento which was the same as Eiji and Sakura's and started eating.
Eiji couldn't help but ask, "You came later than I thought, Rin. Did you have any trouble on the way here?"
Rin blinked her eyes, "Yes, there was a small problem. A boy from the Matou family stopped me for a while and rambled on about impossible things."
"Hoh, is that your classmate, Shinji-kun?"
"Onii-chan, you know?"
Rin feigned surprise.
I don't know since when, she started to become numb to Eiji who knew everything.
Eiji of course knew because he had smuggled shadow soldiers in Rin and Shinji's shadow.
When Sakura fed him in the teacher's office, he even refrained from killing Shinji when he wanted to bet with Rin.
Fortunately Rin did not disappoint him, she rejected the purple-haired boy and even patronized him.
He laughed and enjoyed the ugly expressions Shinji made.
Shinji had to suffer more before he died.
"I just guessed."
Rin refrained from rolling her eyes.
She couldn't believe it.
But then, she explained what happened because she was worried that Eiji would misunderstand her and Shinji.
Without realizing it, she was like a girl worried about her boyfriend misunderstanding.
Sakura was amused and said in her heart. 'Onee-chan is growing well. I'm sure it won't be long before we serve Onii-chan together, hehe.'
Eiji rubbed his chin.
"So that's what happened, and Shinji is also a master like you."
[It's the same as in the original work. Although without Sakura, I don't know who enabled Shinji to become a False Master.]
False Master?
This was the first time Rin and Sakura had heard such a thing.
[In the context of the Fate/stay night series, Shinji Matou couldn't become a true Master naturally because he didn't have a working magic circuit.]
[Without a magic circuit, he can't even summon a Servant because he has no mana. However, he did have a servant under his command and participated in the Fifth Holy Grail War.]
[He could do that only because of the relic left behind by his grandfather, Zouken Matou. With the help of the Book of False Attendant, he was able to create a temporary contract that allowed him to control another master's servant.]
[In the original work, the Matou family had Sakura acting as a true master and summoning a Servant of the Rider class.]
[But in this life, I wonder who was the Master who helped Shinji? But whoever it is doesn't matter.]
[Rin can't possibly lose to that boy.]
Hearing Eiji being so optimistic about her, Rin was naturally happy.
But what she said in his heart next made her angry. Not at him, but at that loser, Shinji!
[Come to think of it, Shinji was the one who had done many bad things to Sakura in the original work.]
[Since learning that Sakura was chosen as the true heir of the Matou family, Shinji began to abuse Sakura for many years before the events of the Holy Grail War began.]
[Not only that, he often beat and insulted Sakura. He treated Sakura like an object or property to vent his frustration over his own failure as a magus.]
[Sakura didn't fight back for years because she was too good. Therefore, Shinji even capitalizes on Sakura's guilt and pity to continue bullying her. He blames Sakura for the loss of his future and dreams in the Matou family.]
[He's such a loser, I wanted to kill him for what he did in the original work. But killing him right away without making him suffer like Sakura is too easy.]
"...!" Sakura was surprised, Zouken wasn't the only one who bullied her in the original work?
But his grandson, Shinji also did bad things including harassing her?
Although Eiji didn't mention the details in his heart, he had a guess about what a boy would do to a girl like her over the years.
She felt dirty, and the killing intent on Shinji surged.
Rin also suddenly wanted to kill Shinji. But as Eiji said, it was too easy if they killed him right away.
*Ding dong~!*
Right after they finished lunch, the lunch break ended.
Sakura and Rin said their goodbyes and returned to their respective classes.
At least that's what Rin knew.
She didn't know that after she left, Sakura went back to the teacher's office.
"Onii-chan, Sakura misses you here. Can we do it before I go back to class?"
The other teachers could not see what was happening at the location of Eiji's table. If they could, they would have been surprised because Sakura suddenly lifted her skirt and her panties fell to the floor.
The plump ass was clearly visible in the teacher's office. With her fingers, she widened her pussy hole in front of Eiji and gave him a seductive look.
"Sakura, you naughty student. Do you know what you're doing wrong?"
Eiji immediately entered acting mode, he was a teacher who had an immoral relationship with his female student.
Sakura narrowed her eyes flirtatiously, she naturally climbed onto the table and opened her legs wide.
Combined with her long white hair, she looked very beautiful and erotic at the same time.
"Sensei, I know what I did wrong. So, I want you to punish me using your penis."
[Sakura, you cultured girl!]
???
In her class, Rin wondered why Eiji suddenly mentioned her younger sister's name?
Wasn't it the same as her, Sakura had already returned to her own class?
Rin wanted to go back to the teacher's office, but a teacher had already arrived in her class and started teaching.
'Damn, what are they doing?!'
Back to the teacher's office.
Eiji inserted his penis into Sakira's pussy and started fucking her without worrying about the presence of the other teachers in the room.
After all, his reality manipulation was still working.
In their eyes, it was normal for him and his female students to do that.
Of course, he did not forget to make the male teachers unable to see what they were doing.
"Ah~! Your penis goes very deep inside me, Eiji-sensei~!"
"Sakura, your pussy is shaking me inside."
"Ah! Ah! Sensei, please kiss me~!"
"Sure, Sakura."
"Mmm~! Mn~! Mn~! Ohh~!"
Still, Sakura's moans made them envious of Eiji!
They can't see, but they can hear!
As for the female teachers? They blushed and many of them tried to peek.
Sakura knew Eiji's fetish, so feeling the stares from the women, she didn't care and continued to let out muffled moans from her mouth.
She wrapped her arms around Eiji's neck and and wrapped her legs around his body, their tongues and saliva intertwined.
Every time his penis tapped the tip of her nursery, she was thrilled and felt she belonged only to him.
Her self in the original work was pathetic, but in this life, she would make sure that she was only defiled by the man she loved.
And that was her onii-chan.
'Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan, Onii-chan...!'
The yandere girl went crazy.
In his classroom, protagonist Shirou suddenly felt his heart ache.
He didn't realize the girl who loved him so much in the original work was now being fucked by another man and enjoying it.
His head felt heavy as a green hat pressed down on it.
Eiji was having fun with Sakura, he liked yandere like her and fucked her in various positions.
For example under the gaze of the female teachers who were amazed by his muscular figure and penis size.
He holds Sakura while kissing and fucks her plump ass in that position.
Many of the female teachers who were watching were married, and felt guilty for their husbands.
Even so, they gulped and were aroused when they saw how Eiji's big dick went in and out of Sakura's ass hole.
It was so hot!
More than an hour later.
"Eiji-sensei, I'm going to class now."
"Yes, and for your information, I'll give you extra points."
"Fufu, thank you~"
Ignoring the male teachers who were glaring at him while gnashing their teeth, Eiji waved his hand at Sakura.
Sakura walked out of the teacher's office with some liquid dripping from under her school skirt.
How could she not?
Eiji had cum three times in her ass and once in her pussy.
From those numbers, it was obvious that he preferred her ass.
Geez, Onii-chan.
You really are an ass maniac.
[How perverted.]
'Miss System, are you still surprised by something like this?'
[No, I just wanted to say it. You pervert, host.]
'I'll take that as a compliment from you.'
Eiji was shameless as usual.
Before he was about to leave the teacher's office, a rather pretty female teacher couldn't resist talking to him.
"Seiya-kun, do you have time after school ends? I'd like to invite you for a drink together."
Unlike the other female teachers who looked at her enviously, she was unmarried and single.
Compared to the others, she was also young and 23 years old.
She stared at Eiji who looked very handsome like a she-wolf staring at her prey.
Obviously after watching what he did with his female students, she also wanted to taste his big sword.
'This bitch... She's testing her luck.' thought the other female teachers.
Eiji glanced at the woman in front of him indifferently, "If I'm not mistaken, you're Nanase-san, right? The math teacher who teaches second year students? Sorry, I'm busy. Maybe next time."
He rejected the woman that many male teachers in the school coveted.
Not only because he was full, he was worried that Rias and his other women would scold him for playing with wild women.
Nanase was disappointed, but still thought she had a chance another day.