Ryoko discovers her brother-in-law Yusaku attempting to steal her husband's seal. Realizing he plans to make her husband a joint guarantor for his debts, she desperately tries to stop him but is instead tied up and lewdly molested. Subjected to relentless torment, she ultimately has her seal stolen. Yusaku disappears, and in his place, debt collectors arrive, humiliating her in front of her husband and violating her plump, mature body.