BAGR-034 The slutty sister who warps the otaku brother's friendship and fetishes Yusuha Mai

A college nerd boy who started living alone after going to school.My sister, who envied such a man, frequently came in and out of his brother's room.A younger sister who negotiates to lend a room as a place to have sex with her boyfriend, but refused because her friend came.The troubled sister decides to execute an outrageous idea that suddenly came up with it.The propensity of Sado who wakes up while driving his brother mentally.Mour of the older brother who was destroyed and masochistic.