'Natsuko,' who began to suspect her often absent husband, asks her son-in-law 'Ryohei' to investigate whether her husband is cheating. Later, Ryohei tells her that he witnessed her husband's infidelity and suddenly says, 'I'll be your partner instead of your father-in-law!' Then he pounces on Natsuko. He had been after her obscene large breasts all along...
