Rena Fukishi feels sorry for her stepson who complains that he's not popular because he resembles his father. One day, she witnesses her son masturbating with her underwear. Feeling sympathy, she helps him masturbate, but her son's demands escalate and he asks Rena to take his virginity. Moved by his kneeling and Kokoro, Rena agrees to have sex with her stepson. Shaking her big breasts with dazzling tan lines, she becomes immersed in forbidden sexual intercourse...