Isaku 1: Rika

An adult hardcore anime! It's the last day of school before summer vacation, when kenta receives a mysterious note. He walks into the old, condemned school building, following the note's instructions. Inside, he finds many girls have received the same note. Everyone decides that this is some kind of a joke, and start arguing about the identity of the prankster. Suddenly, they hear the entrance being bordered up. The nightmare begins as the girls vanish one by one. Rika is the first one to disappear, followed by a shocking video of rika being violated by an unknown assailant. A twisted story filled with scenes of schocking and graphic hardcore sex.