Nearing graduation, college student Nana and her boyfriend have secured a job offer at a top company and are saving up for a graduation trip through late-night convenience store shifts. Recently, Nana has been working more often alone with the middle-aged store manager. Worried that the lecherous manager might be taking advantage of her, he grows increasingly anxious. Could it be...? On his birthday, when Nana fails to show up as promised, he calls her—only to discover the shocking sight of his beloved girlfriend, completely corrupted and climaxing on the manager's insatiable cock.