Hiroaki is attracted to the gentle, enveloping charm of his friend's mother, Hitomi. While his son is away, he can't help but desire Hitomi's body. Hitomi resists, but she is unable to resist the pleasure she has long forgotten during her lonely days, and they enter into a forbidden relationship... Another friend finds out and joins in, and the affair escalates. Her beautiful, well-proportioned, voluptuous body becomes erotically aroused!!!