Sanemi was born into a family with an abusive father who used to hit him and his other 7 siblings as well as his mother. He would lash out so his mouth would use her small body to protect her from him. But one night, Sanemi went out to look for their mother.She had turned into a demon and slaughtered all of his siblings except Sanemi and Genya only lived.Sanemi had to kill his mother to save Genya because she was bout to kill him. Their mother had turned into a demon.Genya and Sanemi are alive.