Junko Harumi, a 32-year-old woman, once dreamed of getting into the University of Tokyo, and now works as a teacher at a prep school. One day three young men appear in her life: Masashi Yakumo, her smart and capable cousin; Yuri Kyohei, an unruly guy; and Yamasita, a former classmate who is Yuri's homeroom teacher. After meeting these men, Junko's life begins to change dramatically.