Ema, who had been active in the entertainment industry in Tokyo, suddenly announced her retirement and was living a debauched life at her countryside hometown. One day, she reunited with her step-brother after several years and found out that he was still a virgin and obsessed with masturbation. Seeing his sister's carefree, braless state, he couldn't contain his excitement and ended up assaulting and having sex with her. Ema also enjoyed the sex after a long time and reached orgasm, leading them to have sex multiple times afterward.
