In Korea, there are various 24-hour service companies such as restaurants, cafes, and convenience stores that are open 24 hours a day. There are many restaurants that are open until late, especially around big cities and tourist destinations, so it's okay if you want to eat at night. In addition, the 24-hour convenience store is very convenient as you can purchase groceries, daily necessities, and drinks.
There's another 24-hour service, do you know what it is?
It is an unmanned print cafe open 24 hours a day.