Episode 1

Episode 1

May 2nd.

It's Golden Week and school is on break for the general public, but it doesn't matter to me, who is a total shut-in.... I guess the only thing I find painful is that my sister will be at home every day.

My younger sister, Kazami Sachi, is a good little sister, unlike me.

She has excellent grades, incredible athletic ability, and is very affable. And above all, her appearance. I couldn't tell if she really had the same genes as me, as her eyes were wide open, her small, sharp face, and slightly pink cheeks. Her lips were plump and glossy, yet somehow still looked childish. Perhaps because she was still undergoing secondary growth, her whole body was rounder than before, with protruding parts protruding and parts that should be retracted retracted. Even from a woman's perspective, she probably had the perfect physique. And she was a first-year high school student, so I guess you could say that girls these days are developing well.

Meanwhile, I, Kazami Mizuki, am already a university student, but to the average man I'm short, have a baby face, and am shy and withdrawn. Because of this, there's no way I could make friends. I'm no good at sports and only average at studying. I'm gradually falling behind in class, and there's no way I could join any club activities. So I've become a complete shut-in.

Going back to the topic at hand, my sister was supposed to be at school, but I wondered if she had come home early today. I wasn't there to greet her, but I happened to leave my room to go to the bathroom, and unfortunately, my sister had just come home at the wrong time.

I immediately looked away from my sister, feeling guilty.

...I feel bad. It's an inferiority complex. It's the worst feeling a poor older brother can have towards his talented younger sister.

Perhaps it's because my sister knew this, or perhaps she just didn't want to talk to her incompetent brother, but she basically never spoke to me even when we met. She disliked me... or so I thought, but she just kept her head down and didn't say anything.

However, something was strange about this day.

"Onii-chan! I'm home!"

My sister dropped her luggage and hugged me with tears in her eyes.

Without understanding what was going on, I let her hug me for a moment, then rejected her. I pushed her away, and without saying a word, went back to my room and locked the door.

"What the hell is he thinking?! Is he making fun of me? Aaaaa"

Inferiority complex.

Jealousy.

Even though I know it's a bad emotion, I can't suppress it.

'Why her? Why me?'

Those emotions swirled around in my mind.

Unable to do anything about these feelings that had no outlet, I suddenly found myself falling asleep.

May 3rd.

When I woke up, I looked for my smartphone, which I'm sure I'd left by my pillow, to check the date and time. However, no matter how hard I stretched, I couldn't find it. Well, I suppose that's to be expected, considering I was still under the covers and had my eyes closed.

Since nothing was working, I had no choice but to stick my head out of the futon and open my eyes.

"Eh……?"

I couldn't find my phone, but I knew the time. It was a little after 8 o'clock. I looked at the alarm clock next to my pillow, but there was no way it was supposed to be there.

That's because this was an alarm clock featuring a character from a study material that I used when I was in elementary school, and I must have thrown it away by the time I entered junior high school.

That wasn't the only strange thing.

I can't find the PC or desk I bought after becoming a university student. Instead, I have a simple desk I used in elementary school.

That alone might have been fine.

There were a number of stuffed toys by my pillow that I didn't remember buying. The wallpaper was pale pink and the curtains were the same shade. The boys' manga I had been reading for years had disappeared from the bookshelf, replaced by girls' manga. No matter how I looked at it, it was a girl's room, not a college student's.

As I was standing there dumbfounded, I heard the sound of the door opening.

"Mizuki-chan? Are you awake yet?"

I could see my sister's face from behind the door. After making sure I was awake, she brought the stand mirror into the room and locked it.

"If you're awake, then let's get started. I'd like to explain right away, but first, take a look at this."

My sister pointed me to the mirror, and when I looked in, the college student me was nowhere to be seen.

"Haha... you're kidding, right...?!"

The person reflected in the mirror was a girl a little smaller than my sister, probably around elementary school age.

She has the face of like my younger sister who looks like she will be a beautiful woman in the future. Her hair is no longer the same short as it used to be, but has grown into slender black hair that reaches down to her shoulder blades. Her slightly large, baggy polka dot pajamas make her look even more adorable.

The most noticeable part was her voice. When I spoke, a cute girlish voice came from her throat. 

There was no way to mistake it, there was no mistake.

"I've become a girl..."

I put my hands on my face, and the girl in the mirror makes the exact same movements. I pinch my cheek and it hurts. It seems that this isn't a dream.

As if satisfied with the situation, my younger sister spoke.

"I want you to grow up to as a girl and become my little sister."

From that day on, my life changed completely.