The Drawings v1.1 by Higurashika - Adult Sex Game

"It is good to have a sister. You can share everything with her: your thoughts about boys, dresses or feelings."
"But what if everything you knew is a lie? What if your school life won't be the same after some cruel event?"
"Will you accept your lineage? Will you stay the same when your parents reveal their biggest secrets to you?"

This story contains very cruel episodes (beating, drugging, torturing), it's not for everyone. The game is something in between Dexter and House of 1000 corpses.