December, the month in which the Heisei Era ended, and the new Reiwa era began. In the Heisei era, the Reiwa era, and even today, a certain convenience store remains open 24/7/365. All the part-time workers have been replaced, leaving only the manager to continue working as usual. Last month, another part-timer quit, and this month, a new part-timer has joined. The new part-timer, who is about one year older than the manager, seems to be part of Gen Z.