Aoi works part-time at a convenience store. Her husband (who works nearby and has no sex life) is a regular customer, and she is a little fed up with seeing him at home and at work. Then, a young man named Tatsuya becomes her junior at work... Unlike her husband, Aoi is attracted to him because he is young and kind, so she invites him out for drinks, calling it a welcome party. From that day on, the two of them become physically involved, and they continue to have an affair that is limited to the workplace... They continue to have affairs at the store, whether they are working or on break. Before she knows it, Aoi gets wet just by punching the time card...