Discovering that his teenage daughter was masturbating in the bedroom, knowing that she had no lover, the father sought to "help", the brother after learning about it was equally enthusiastic, he supported his father.
Seeing his daughter masturbating, the father and brother enthusiastically "helped" is a sex movie incest of the Hibino studio, the heroine named Mao Hamasaki, the film tells the story of a lewd love between a daughter in her twenties who is constantly "tormented" by her father and brother. After being found out by her father that she was masturbating, it seems that Hamasaki also wants to fuck her and she plans to just have sex with her father, but unexpectedly while she is "raining" with him, her brother finds out...
Because she didn't want her brother to tell her mother that she had incest with her father, the girl decided to let her brother "participate" with her. This secret is only known to 3 people, no one else...