Nao, a young wife student who gives birth immediately after marriage and attends college while raising children. Nao is a tutor for Yoshioka, an examinee who lives next door to the same apartment as Nao, through an introduction from the university. Nao has a serious and bright personality, and is weak to push and can't refuse. Sometimes Yoshioka tries to gain sympathy for Nao, and sometimes uses her exams to give her her virginity! Nao, who has a husband and children, desperately resists, but after giving birth, her frustrated body gradually loses to the momentum of young students.