The first part is written from Chika’s first-person perspective.

Thinking about when the initial trigger was, it goes back to when I was in first grade of elementary school.

"Ahhh...!?"

That happened on my way to school in the morning.

I was wearing a miniskirt that day, and suddenly, a gust of wind blew and flipped it up in a big flare.

"Chika...! You really need to be more careful."

"Y-yes... Thank you, big sister."

I quickly covered it up, and my older sister, who was walking to school with me, helped hide it, so no one around us saw.

"..."

But then...

A feeling of "I wanted to be seen" welled up inside me.

I couldn’t understand why I felt that way at the time.

But even if I didn’t understand it, it stayed in my memory.

Perhaps that’s why, whenever I had the opportunity to use my parents’ computer...

I was unconsciously searching for upskirt photos.

So, I ended up looking at all sorts of erotic images of panty shots.

If I had stopped searching then, I think I still had time.

But I didn’t stop.

So I ended up looking at even more explicit images... pictures and videos of girls being raped.

When I saw those images or videos, I immediately deleted everything, including the history, and walked away from the computer, intending to forget about it.

But I couldn’t forget.

And as I grew older, a certain desire began to sprout within me.

"I... I want to be violated."

Rape fantasy.

Such a desire had begun to sprout within me.

Of course, I knew that desire was not a good thing.

However, once a desire had taken root, it wasn’t so easy to extinguish it.

No matter how hard I tried to suppress it, it kept surfacing and lingered somewhere in my mind.

No, on the contrary, my rape fantasies only got worse day by day.

"I’d like to be made to kneel naked."

"I want to be violated by someone inferior to me."

"I’d like to be whipped or something."

"I want to be subdued and have to declare defeat."

"I want to be sexually trained to the point of being completely helpless."

"I want to be cheated on even though I have a girlfriend."

"I want to fall into a miserable state."

Bad desires kept overflowing, and finally,

"I want to be raped together with my older sister."

I’ve even started thinking things like that.

If it were just about myself, that would be one thing, but she is pure, kind, and very beautiful.

I knew it was awful, and I knew it wasn’t good, that I was having naughty fantasies involving my beloved older sister.

But the more I thought it was the worst, the more I was getting excited instead.

I’ve come to realize that I’m quite the pervert myself.

There’s nothing we can do about this.

In that case, the only thing we can do is to be clever and avoid doing it in reality.

I think I was fortunate to have the rationality to know that I didn’t want to do it in reality.

You can think of countless risks involved in being raped in real life, and just thinking about it sends shivers down my spine.

But just because you think it’s awful in reality doesn’t mean that rape fantasies disappear.

So I masturbated with various mental scenarios, and I had somehow managed to satisfy and release my rape fantasies.

That’s how I was somehow managing to get by... and that’s when it happened.

I learned that a new game company called "White Games" was releasing a rape game called "Fantasia World."

"If it’s this game..."

With this game, you can feel as embarrassed as you like.

You can be humiliated as much as you like.

You can be looked down upon as much as you like.

You can be violated as many times as you like.

You can fulfill all your desires.

Furthermore, since this game is for single-player only, there’s no need to worry about anyone else finding out who you are.

Regarding the age limit, I turned 18 last month, so that’s not a problem.

I decided to buy this game immediately.

And the content of that game was... exactly what I had always dreamed of.

I played this game obsessively every single day.

Of course, I studied hard to ensure it wouldn’t have any negative impact on my real life.

If I failed my entrance exams because I was playing erotic games, I wouldn’t be able to face my parents or my older sister anymore.

...I know I can’t meet her face-to-face anyway since I’m a high school girl with rape fantasies who plays erotic games where she gets raped herself...

...Well, anyway.

Today, once again, I logged into the world of "Fantasia World" to be violated.

Chika logged into the world of "Fantasia World".

"Phew..."

Chika let out a sigh of relief as she stepped off the fountain in Middle City.

Her appearance was the same as in reality.

Her facial features were strikingly similar to Shiori’s, with a beautiful face that was truly captivating.

Her hair was straight and reached past her shoulders.

Her body shape was also the same as in reality.

She was 165 centimeters tall.

Her bust, waist, and hip measurements were 97, 60, and 91.

She had a larger I-cup bust than Shiori, and her hips were also on the larger side.

However, her waist was firm and slender, and her arms and legs were long and graceful, so she didn’t give the impression of being overweight.

If Shiori’s style was roughly half beauty and half eroticism, Chika’s style, with her large breasts and big buttocks, could be described as having a stronger erotic appeal.

Next, let’s talk about her outfit.

A blouse, tie, blazer, and a miniskirt.

Yes, it was a school uniform.

Since it was for one person and she wouldn’t be meeting anyone, Chika was playing the game with the premise in her head that "one day she was suddenly transported to another world."

"Okay... then let’s go over there today."

Had Chika decided on today’s destination?

No, the player named "Chika" started walking straight toward somewhere.

Chika arrived at a certain back alley.

As she went a little further in, she found a man lying down.

The moment Chika recognized him, a metal collar appeared out of nowhere and clicked onto her neck.

That collar was... a "Collar of Obedience."

It was the same thing that Shiori had been tricked into by Yakubi the other day.

"Ahhh...? Oh, you’re here. Heh heh."

"...!"

As Chika shivered at the hard feel of the collar, when the man noticed Chika, he grinned and sat up.

"I’ve been waiting for this, hehehe... So, first, let’s get the money."

"......please......"

Chika nodded without resistance to the man’s request and quickly handed over half of her money.

"Heh heh, now I can eat something delicious again. Alright, next, let’s have you serve me as usual. First up, those huge breasts of yours."

"Y-yes..."

The man who received the money grinned, fiddled with his pants, pulled out his penis, and pointed it at Chika.

Responding to the request, Chika, trembling, unbuttoned her blouse, revealing her massive I-cup breasts, then knelt down in front of the man and began to give him a titjob.

"Mm, uh... ah, mm... uh...! Mm, mm... ♡"

"Heh heh heh heh..."

Seeing Chika begin giving him a titjob, the man grinned and surrendered himself to her service.

Why was Chika so obedient to this man?

That was due to the effect of the "Collar of Obedience" that was placed around Chika’s neck.

The person to whom that collar would result in obedience was this man.

But why did this man put a collar around Chika’s neck?

That was the first time this man raped her.

While being raped and brought to orgasm repeatedly, the man asked her, "Do you want me to stop?"

When Chika nodded in agreement, the man quickly pulled out a collar and demanded that she declare her obedience to him.

And Chika... went along with it.

As a result, Chika became this man’s property.

From then on, every time she met this man, a "Collar of Obedience" would appear around her neck, and she would have to comply with all his demands.

This guy’s level was 5. To put it bluntly, he was a weakling.

It was already clear that she was overwhelmingly stronger.

Yet, the collar made her obey.

"Ahhh... To think I’d submit to someone like this... It’s really... uh... ♡" The worst, superb.

That situation greatly satisfied Chika’s sexual desires.

Therefore, while seemingly showing a displeased expression, Chika was secretly pleased and continued to perform the titjob service.