Yumi Kazama, a beautiful mature woman whose back is already erotic, has moved to the apartment where she lives. A plump buddy with big boobs and a big butt. The men who live in the condominium want to get closer to the pheromone munmun, and help them in various ways. However, the men who are not immune to the beautiful mature woman are delusional and crumbled with the sex appeal created by Yumi. At the suggestion of Yumi, the men invited to a dinner party to celebrate the move decide to make a decision in front of Yumi who has fallen asleep and try to start touching.