Ema works part-time at a convenience store and has grown distant from her gambling-addicted husband. Though guilty about the attention from her younger adult coworker Kuroi, loneliness and the thrill of being desired lead her to accept him. Their sexual chemistry is irresistible, and even a two-hour break-time rendezvous brings at least three ejaculations. She sinks ever deeper into days ruled by passionate adultery and lust.