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I'm a freeloading student and I'm horny for my sister.

"Let's have sex...?"
I am staying in my sister's room.
In the dark, she thinks I'm her boyfriend, and she's naked and close to me...Arrrgh! I'm so horny!

...... My life is controlled by my sister's violence.
In my one-room apartment, I am forced to do all the household chores and serve my sister every day...
My sister is always vulnerable and erotic, but I want to get rid of this kind of life as soon as possible.
One day, I was ordered to stay out overnight, but I was careless and slept through the night.
When I wake up, my sister and her boyfriend are already in front of my room.
I made a lot of wrong choices and ended up having sex with my sister pretending to be her boyfriend!

Wow, that's hot! It deserves a sequel!

Base +6

I came here after reading the Ch1 translation, I have no idea what was said, but because the violence toward MC all I can think is:
FINISH HER!

*MORTAL COMBAT!*

Base +11