Soon after getting married, Nao gave birth and juggled child-rearing while attending university. Nao tutors Yoshioka, a student preparing for exams who lives next door in the same apartment building, through an introduction from her university. She is serious and cheerful, weak-willed and unable to refuse. Yoshioka sometimes tries to gain her sympathy and other times uses his exam preparations to attempt to take her virginity! Despite having a husband and children, Nao desperately resists, but her body, frustrated with desire after giving birth, gradually succumbs to the vigor of the young student…
