With his wife and son living elsewhere, a man begins staying in contact with his son's adult daycare teacher, Ryu, who starts visiting his home more and more often. A conversation about his son unexpectedly turns sexual when her casual touching reaches his crotch. She grabs his cock, gives him a wet blowjob, and takes his load in her mouth. Ryu then changes into a naked apron and turns the kitchen into the setting for their forbidden affair, later showing off a seductive lingerie look as well.