Kaori, who has been married for six years, has no complaints about her husband's sexual intercourse, which is only a few times a year. Her husband enjoys sex with his wife, who is beautiful, sexy, and surprisingly sensitive, but after six years of dating and six years of marriage, he can't help but get bored and they haven't had sex in a while. So the husband asks his college friend, who was a junior and his wife's classmate, to cuckold him. Kaori gradually falls into the plan, and in the end, she crosses the line and her sensitivity doubles with a sense of guilt! She becomes a lewd woman who uses her hips violently in the cowgirl position and begs for more! In the end, she climaxes while apologizing to her husband, even her anal area twitching.