Yumi Kazama, a beautiful mature woman whose back is already erotic, has moved to the apartment where they live. She is a plump buddy with big boobs and a big butt. The men who live in the apartment want to get closer to the appearance of the pheromone, and help in various ways. However, men who are not immune to beautiful mature women can't stop delusions about Yumi's sexiness and crumble. At Yumi's suggestion, the men are invited to a dinner party to celebrate the move.
