[BAGR-034] A sister who distorts the friendship and propensity of an otaku big brother Mai Arisu

A college student otaku boy who started living alone when he went on to higher education. My sister, who was envious of such a man, began to frequently go in and out of her brother's room. - A sister who negotiates to rent a room as a place to have sex with her boyfriend, but refuses because her friends are coming. - The troubled sister decides to implement a diabolical idea that she suddenly came up with. - A propensity called Sade that awakened while mentally pushing her brother. He ridicules his brother, whose friendship has been destroyed and made into a masochist.