Short-haired cutie Satomi Ishikawa has been married for three years, while her husband lives away for work and she cares for his father alone. Changing the underwear he wets because of an injured hand is part of her routine, but their relationship goes much further. Her kind father-in-law pleasures her with oral sex even when he cannot perform, and soon they are bathing together and playing soapland games with the bubbles. Sometimes he is still virile enough to go from 69 to ejaculation, and Satomi eagerly tends to his sexual needs while her beautiful breasts bounce and she moans in pleasure.