Himekagura ~Kurutta Jouen~

Takato wakes up in a female's room, and he has no recollections coming here. Why is he here? It seems he has lost his memory. He tries to remember about his past, but a voice keeps bothering him, saying, "Rape girls..." Not being able to resist this voice, he begins to rape a girl. As he is raping her, he suddenly remembers a piece of his past: a scene where he is brutally killing someone. He learns that he's from an assassin group called the Kagurazaka.

He remembers his past as he rapes girls... Who or what is the mysterious voice!? What will become of Takato?

[From Gamelex]