4The married life is treating You and Chiharu pretty well. After working a hard day at work, You comes home to his loving wife and they spend the whole night in a passionate, devoted embrace. Recently, Chiaki, Chiharu's twin sister, has been interrupting their torrid nights and has been sending You videos of her own torrid nights. You is stunned, but seeing someone who looks like his wife getting banged by another man stirs something deep inside him. The next day he comes home to a clingy Chiharu who's raring to go down, but things take a turn when she shows You a new picture of Chiaki, but for some reason she's wearing a wedding ring...