Eighteen years into her marriage, Reiko Kobayakawa's relationship with her husband has grown cold due to his workaholic nature and neglect of family life. When her son gets into trouble at school and her husband ignores her pleas for support, she finds herself lost and overwhelmed. The only one who stands by her is her son's homeroom teacher, Ozawa. His warm, compassionate demeanor opens her heart, and she gradually begins to fall for him. Discovering her husband's infidelity pushes Reiko to the edge, emotionally and physically drained. Unable to endure any longer, she seeks comfort in Ozawa's kindness. Finding solace and healing in his warmth and affection, she slowly becomes deeply involved with him, losing herself in their growing intimacy.