Yuri, a girl who is known and mature, has long had feelings for her brother more than her brother and sister. I couldn't talk to anyone about such a feeling, and even now my boobs have grown so big that I still spend days delusioning in the room every day, comforting myself and extinguishing the lighting of the body, but one day I finally reached my limit and became unable to stop what was the action taken by Yuri? The thought of a girl who has been hiding in the depths of glasses is released.