After being fired from her job, married woman Haru moves in with her father-in-law until he finds a new job. Nothing was ever supposed to happen, but one day her father-in-law, who is aroused by her voluptuous body, demands her and forces her into a relationship. From that day on, her days are filled with pleasure...! What's more, her husband gets injured and is hospitalized... Her body develops and her mind changes... "I'm so sorry..."