Hikari, a voluptuous mother in her fifties, is sexually aroused and yet fascinated by her son Koichi's body. She masturbates every afternoon ...... One day Hikari meets Ito, a sexy salesman who comes to sell adult toys, and she has sex with him, his thick penis thrusting deep inside Hikari! Hikari's sagging breasts tremble as she climaxes, and her lust is further aroused...