“I might be better than your wife.” A younger female coworker seduces a married middle-aged salaryman and draws him into an obsession. Mai is kinder, cuter, more affectionate, and far more sexual than his wife, leaving him desperate to fuck her every day and every night, over and over. She invites him to stay as long as he gives her plenty of sex, and he loses every last bit of restraint. This breathtaking mistress takes possession of both his body and his heart despite the family waiting at home.