Forgive me... I was raped by my sister's boyfriend

Rina moves to Tokyo to rely on her sister Maya, who is married and lives in Tokyo, and lives in her husband's house. Despite the sisters who are making fun of their recent boyfriend talk, the husband is so worried that he is responsible for taking care of his daughter, who is about his age. Despite all this worry, Saeki sends Rina off on her way home from a date, and comes to greet him, a friendly man... However, this man is serious on the surface, but his true nature is women. He is aroused by Maya without any sensibility...