BAGR-025 Ayase Kokoro, the bitch sister who distorts the friendship and sexual desire of the otaku brother

Des：A nerdy male college student who started living alone after graduating from college. The sister was jealous of such a man and began to frequent her brothers room. My sister negotiated with her boyfriend to rent a room so she could have sex, but he refused because she had a friend coming. The troubled sister decides to carry out an evil idea that suddenly occurred to her... He discovers a habit called Sado while mentally pushing his brother. He mocks his brother, who ruined their friendship and became a masochist.