"Yumi" and "Misa" are classmates. They're both now 30 years old, and Yumi is a married woman, while Misa remains single. This is because Misa's body has become incapable of loving any other woman, due to the lesbian pleasures that Yumi taught her when they were students. Even now, Misa still thinks about Yumi. At the class reunion, which is held for the first time in a long time, Misa puts a plan into action. Unaware of this, Yumi becomes indulged in memories and gets drunk. Misa restrains Yumi and puts her plan into action...