Yoshiko Ariake plays career lady Hineko who works for an interior design company. She's a confident woman, dedicated to business politics, but has never been willing to give herself to romance. In fact, it's easy for this fashionably bitter woman to be unfaithful in a relationship. Sparks fly when she meets a handsome rival (Yoshimitsu Onimaru).
Cheating girlfriend but not so clearly defined because the main chick, who fucks her friend's old boyfriend and a handsome co-worker of hers, doesn't seem to be in an official relationship with that guy who sleeps at her place and whom she sleeps with.