BAGR-038 - Otaku older brother, friendship and sexual preferences distorted by a bitchy younger sister, Shiraishi Kanna

A college student otaku male who started living alone due to university entrance. His younger sister, envious of such a brother, began to frequently enter and leave his room. One day, she negotiated to borrow her brother's room as a place to have sex with a friend, but was refused because friends were coming. The troubled younger sister suddenly came up with a heinous idea to execute… A sadomasochistic habit awakened as she mentally drove her brother to the brink. She mocks the sight of her brother, whose friendship was destroyed and was masochized.