BAGR-055 - Otaku older brother's friendship and sexual preferences are distorted by a bitchy-style younger sister, Amano Noa

A college otaku male starts living alone due to university entrance. His younger sister, envious of her brother, began to frequently enter and leave his room. One day, she negotiates to borrow her brother's room as a place to have sex with a friend with benefits, but is refused because friends are coming over. The troubled younger sister suddenly comes up with a heinous idea to execute… A sadistic tendency awakened while mentally pushing her own brother. She mocks the figure of her brother whose friendship has been destroyed and has been masochized.