"I'll take care of you with the housework and everything." While his wife, a career woman, is away on a long business trip, his wife's sister, Ichika, is staying with him. He's alone with the man he secretly has a crush on. His eyes are glued to her huge breasts that shake every time she does housework. Breathing heavily, he goes to peek into the bathroom and she seduces him by showing him how she masturbates! "Why don't we take a bath together?" His crotch is on the verge of exploding at the unexpected invitation. The forbidden creampie sex with his busty sister-in-law continues until he gets hot and bothered!