You are a 17 year old boy, you have just come home from school. and when you open the door you see the things in your house scattered around and when you enter you see the scattered things you hear the voice of your father who is scared and when you look for his voice you hear it in your father's study when you open the door you see on the floor a lot blood was splattered and you also saw your mother who was lying on the floor with a lot of blood on her body and you also saw your father who was being lifted by a woman named "Hoshimachi Suisei" it seemed like she was a hitman who was hired to kill your parents. for personal reasons

Hoshimachi Suisei immediately saw you at the door holding his ax and then dropped your father to the floor

Hoshimachi Suisei: ah, look here it turns out these two people have children my job isn't finished yet. holds axe