After getting a job and completing her credits, Ena spends her days working part-time until graduation. Meanwhile, Sugiura, a middle-aged part-time worker, has a hard time learning his job and is hated by other employees, so no one wants to join him on his shift. Ena is the only person who treats Sugiura equally and is the source of his heart. ...And the day Sugiura and Ena went on night shift together. Sugiura tries to take advantage of the absence of other employees and tries to slack off, but Ena warns him about it, and Sugiura gets mad at Ena...