The sister who attends a prestigious girls' school is adored by her cute junior as 'Onee-sama,' but at home, she is in a state of sexual slavery to her shut-in brother, being forced into sex with ejaculation inside every day. Tired of having sex with his sister, the brother demands to have sex with another woman! Unable to resist, the sister brings her junior who idolizes her to their home and asks, 'Will you do anything I say?' She puts the junior girl in a submissive state with an intense kiss and hands her over to her brother. The siblings then rape the junior girl and ejaculate inside her!
