Kore tte, Riajuu? ~Kuro Gyaru ga, Doutei o Kyouiku Suru Sou Desu yo~ by Appetite - Adult Sex Game

"Hey, what are you looking at? Who are you, uh,......?"
I do not know who are you! Hey, what are you staring at, go away!

The sisters were completely naked in the classroom.
The sisters were naked in the unlocked classroom.
Then the two of them called me a "pervert" and made me their servant, telling me not to tell anyone.
Well, they give me money to run errands.

After such days continued for some time, after school.
Sexually uninhibited girls sit on chairs with their legs spread and discuss the sex they had with the guys they slept with.
Even just listening to them talk about it makes me strangely cranky and delusional.
I thought about this, about that, about all sorts of ridiculous things - and the next moment I had an erection.