In the summer class of the prep school, I will live alone in Tokyo for only two weeks, and I will visit the weekly apartment where I will live. It's temporary, but I'm excited about my life in Tokyo ... but I'm worried even if a lot of garbage is scattered next to my room. In the room next to the condominium, there lived a dirty brother (Oni) who could continue masturbating even after masturbating with Shimonuma and did not post-process. Moko squeezes her courage and goes to Shimonuma ...