Rena works part-time at a convenience store, but her stubborn personality and desire to do things her own way have made many customers unhappy, forcing the manager to constantly resolve issues for her. Not only that, but she is also constantly affectionate with her boyfriend who also works there, which makes the manager even more annoyed. One day, the store suddenly loses power, and the door cannot be opened, trapping the two of them there for 24 hours. With only the two of them, Rena continues to maintain her arrogant attitude, continuously insulting the manager until he can no longer hold back...