Nana, a female student living in a rural town, had made it her daily routine to stop by her favorite coffee shop after club activities. One day, she was surprised to learn that the shop was closing down, and she offered to help the owner, saying, "I don't want everyone's place to rest to disappear! I'll help out." The owner, overwhelmed by Nana's enthusiasm, agreed. From that day on, her days of working part-time after school began. A few days later, while cleaning the shop, Nana suddenly noticed that there was a storehouse. Nana secretly entered and saw the owner's secret...