Miho, who was married to a kind and serious husband, lived a happy life. However, the sex with her husband was too bland and she was plagued by sexual frustration. Then, of all things, Miho ended up having a relationship with her own son. At first, the two were tormented by guilt, but her son was obsessed with Miho's extremely sensitive body, and Miho also enjoyed being teased by her son's impressive penis. Soon, the two of them began to make love in secret, even when her husband was nearby...