Nana is a high school girl living in a rural town. It was her daily routine to stop by her favorite coffee shop on her way home from club activities. One day, she was surprised to hear that the shop was going to close, and offered to help out, saying, "I don't want everyone's place of relaxation to disappear! I'll help out." The shop owner was persuaded by Nana's enthusiasm, and from that day on, she began working there part-time after school. A few days later, while cleaning the shop, Nana suddenly noticed that there was a storehouse. Sneaking in, Nana saw the shop owner's secret...