Rika has a gentle and calm personality. Because of this personality, she never complained about her sex life, but her husband has premature ejaculation and has never made his wife Rika cum. Every time they have sex, her husband feels guilty that his wife is in a tuna-like state because he is bad at sex and premature ejaculation, and he is not enjoying it. So her husband thinks that she might have some fun with other men, and tells her that Ito go out drinking or hang out, but she refuses, saying that she has more fun with her husband. Her husband has no choice but to tell his brother and sister about a plan he has and put it into action... Rika shakes her big tits violently and feels sorry for him, saying, "You can't do it anymore," but she climaxes many times with her brother-in-law's dick.