BAGR-025 - Otaku older brother, friendship and sexual preferences distorted by a bitchy younger sister, Ayase Kokoro

A college otaku male who started living alone due to university entrance. His younger sister, envious of him, began to frequently enter and leave his room. She negotiates to borrow the room as a place to have sex with her boyfriend, but is refused because friends are coming. The troubled younger sister suddenly comes up with a heinous idea and decides to execute it… A sadomasochistic tendency awakened as she mentally drives her own brother to the brink. She mocks the sight of her brother, whose friendship has been destroyed and who has been masochized.