Yumi is addicted to BBQ recently. One day, when she behaves to her son's friend Kosuke who came to her play, he keeps an eye on Yumi's plump body. Yumi who noticed it invites him with a mischievous heart. However, Kosuke's unequaledness did not fit in with a one-time launch, and repeatedly ejaculated like a monkey, continuing to devour her ripe body. After a while, Yumi's body begins to scream at her endless copulation with him who has her inexhaustible stamina.