Hiroshi stays over at his friend Tetsuya's house and meets his mother, Rei. She flaunts her voluptuous body and comes onto him without hesitation. Unable to control his excitement, Hiroshi gives in to her advances. Rei, left alone due to her husband's long business trip, takes advantage of Hiroshi's presence to satisfy her pent-up desires. However, Hiroshi's endless stamina leaves her body screaming for mercy.