Single mother Ayame has lovingly raised her only son, Aito. One day, Aito's homeroom teacher suddenly visits and reveals that he was caught secretly filming inside the school. Shocked, Ayame finds herself drawn to the teacher, who sincerely confronts her son about his wrongdoing. Their bond gradually deepens, and she unexpectedly falls in love. However, when Aito discovers their secret, his sexual desires surge uncontrollably. Overcome with guilt, Ayame decides to use her own body to teach Aito about sex. Their relationship spirals into a whirlwind of love, guilt, and raw desire.