Onee-chan Is Done For!

Oyama Mahiro from a timeline where they were born as the older sister instead of older brother. An introverted girl who has been twisted by the inferiority complex towards her younger sister. A human relations trauma and failing her entrance exams combined to turn her into a shut-in NEET, but then she ended up genderbent by Mihari's shady drug... In this timeline, she has been transformed into a younger brother. Additionally, since her gender is reversed, the people she meets and the relationships she has are somewhat different compared to the original story... With all sorts of things happening as she lives as a boy, what will become of our "former" Onee-chan...!?

A... Ah, I'm sorry, I'm sorry...

Big sister in her high school days, and big sister (little brother) turned into a middle schooler (?)

She used to be a gentle and cool big sister.

And this is how she turned out!

Ehe ehe...

Unlike Mahiro from the original, she loves BL

Dislikes yuri instead (or rather, she's afraid of women in general after some events in high school)

You turned out pretty cu... cool, Onee-chan ♡

Miharii~ Did you spike my food!?

What was there, is gone! What wasn't, is there!

Hey, girls! You made Mahiro cry, didn't you!?

You're the worst.

It's opposite!

Since Mahiro's sex is reversed in this timeline, a number of weird things have happened.

T-this girl...

Mahiro-kun! I'm expecting great things from you!

In this world, Miyo-chan is more quiet, and in exchange, the class rep is super excited.

I just felt a chill for some reason...