Kojima, whose body has become flabby due to lack of exercise recently, is invited by his boss's wife, Touko, to train together. Kojima, who has secretly had feelings for her, can't help but get an erection when she unconsciously shows off her shapely figure... Touko, who has not had sex with her husband for a long time, is also swept away by his overflowing sexual desire and asks, "Is it okay for an old woman like me to be with you?" The sexual desire between the two of them rises from that moment on and knows no bounds...