Nami, a high school teacher, was fired after engaging in a sexual relationship with a student. She later married Hiroshi, but when his company went bankrupt, she began working as a private tutor for Takuya, a student preparing for university entrance exams. Takuya, who harbored feelings for Nami, would make love to his girlfriend, Yuki, while thinking of Nami. On her way home from Takuya's house one day, Nami ran into Akira—the student with whom she had previously had the illicit affair—and shared a one-time tryst with him. This reignited Nami's sexual desires, leading her to seduce Takuya...