[BAGR-016] sister who distorts the friendship and sexual habits of the otaku brother Mio Ichijo

A college student otaku boy who started living alone when he went on to higher education. The younger sister, who envied such a man, began to frequently come and go in and out of the room. A sister who negotiates with her brother to rent her brother's room as a place to have sex with her boyfriend, but refuses because her friends are coming. My troubled sister suddenly decides to implement a diabolical idea that comes to mind ... A habit called Thad that awakens while mentally pushing his brother mentally. He ridicules the figure of his brother whose friendship was destroyed and made to become a masochist.