the younger sister who is a high school student is sleeping with her panties fully exposed. The brother, excited by the sight of his sister's panty-exposed figure, immediately grabs his cock for a jerk-off session. However, he is quickly noticed, and his sister treats him as a pervert for lusting after her. But she gradually feels sorry for him. She offers to help, but the sister, tired of the brother who can't cum, decides to do something about it.
