Reiko Kobayakawa enjoys inviting her son's friends over and treating them to meals. Her latest obsession is hot pot. One day, she discovers that her son's friend, Kousuke, is infatuated with her voluptuous body. Playfully starting to nibble on her, he quickly reveals his insatiable, rock-hard cock. With stamina that shows no sign of weakening after one or two ejaculations, Reiko is relentlessly fucked over and over until she realizes it's already morning. Day after day, she continues to mate with Kousuke, her body pushed further and further beyond its limits.