Ever since he started living with his wife's mother, Maria, Kazuya has been unconsciously exposed to her sex appeal. Even though he knows he shouldn't think about indecent things, his worldly desires won't go away. At that moment, he catches a glimpse of Maria changing her clothes. Her breasts are about to spill out of her corrective underwear, and her meaty butt is tightly squeezed in a cramped way... Kazuya is aroused by her plump, ripe body.