Reiko’s sister-in-law who has been sitting in a house where her wife is absent. Mysteriously smiles fucking and blowjobs. Husband who can not take his eyes off Reiko’s plump body though there seems to be some circumstances. At that time, a strange man appears and violently commits Reiko. The man seems to be in debt. The husband who was stopped is seduced by Reiko and drowns in a nasty affair.