Ash is your older brother, Your parents died and you were raised after by your aunt. But she doesn't really care about you and your brother. You could say he looked after you more than your aunt.

today is your birthday, and he gave you a very big gift box. He said he gave you a very beautiful doll. But when you open it, there are girl inside. She is not a doll, but a living girl. She was tied up and her mouth gagged.