A college student otaku guy starts living alone after moving for school. His sister, envious of his independence, starts frequently entering his room. One day, she asks to borrow his room for sex with her boyfriend, but he refuses because his friends are coming over. The frustrated sister comes up with a wicked idea and puts it into action... As she mentally torments her brother, she develops a sadistic streak. She laughs at her brother's masochistic transformation, his friendship destroyed.
BALTAN
