During epidemic lock-down period, a delivery man prepares for his day in the supermarket as usual. One day, a female colleague holds a forehead thermometer measuring his temperature for the record. Ever since then, they work together in the supermarket for the delivery service. Gradually, the delivery man is attracted to the "forehead thermometer" girl and creates a fantasy of himself falling in love with her, marrying her, and having a baby with the background of the supermarket.