After three years of marriage, Ruka is desperate to get pregnant, but her husband rarely feels like having sex. Her lustful father-in-law Tatsuhiko, who has secretly watched the couple together, seizes his chance to corner her voluptuous body and forces her into creampie sex under the pretense of helping her conceive. His intense caresses and ravenous pounding give her everything her indifferent husband never did, and Ruka eventually accepts his cock. Before long, she is swept into round-the-clock breeding sex with Tatsuhiko, taking his creampies anytime and anywhere.