Junko Harumi was once a model student during her middle school and high school days. She failed to enter the prestigious Tokyo University and her life has not gone smoothly since then. She has a hard time finding a job and having a romantic relationship. Now, at the age of 31, she works as a teacher at a private institute. 3 men, who vary in type, appear in front of her. Masashi Yakumo is her cousin but smart, Kyohei Yuri is a disorderly high school student and Kazuma Yamashita is Kyohei ’s teacher in high school.