Daisuke patiently endures the sex appeal of his wife's mother, Chiharu. Even though he knows he shouldn't have any wicked lust for her, his body is obedient and he spends his days in agony. At that moment, he suddenly sees Chiharu getting changed. The corrective underwear she is wearing because she is worried about gaining weight in middle age envelops her exquisite body with plump, large breasts and beautiful areolas, highlighting her obscene, ripe body lines. Chiharu's lewd body, which is far beyond his imagination, makes Daisuke's sexual desire run wild...