Saki Mizumi plays Natsumi, a teacher tormented by her alcoholic husband who destroyed their family. For her, the bittersweet memory of a past affection with her former student, Osawa, becomes a source of strength to endure her daily suffering. One day, they unexpectedly reunite as adults, and his warm, gentle words stir emotions deep within her. Though the student-teacher barrier no longer exists, she struggles with guilt over the betrayal of her marriage. Yet their feelings grow uncontrollable, and a new relationship begins to blossom between them...