Progress with programming is moving even faster than I expected. In this time, I've managed to implement a day and night cycle system. Initially, I thought I would need to create duplicate locations and switch between them depending on the time of day, but I found a much simpler and cleaner solution.
I've also implemented a system for characters to move between locations. They now change their location based on the time of day, and each girl has her own daily routine. Some prefer to sleep at night, while others enjoy sitting by the campfire, and some like to work at night and spend their day at the campfire, and so on.
In the future, the player will be able to influence where a girl goes through their actions, for example, by arranging a meeting somewhere. Additionally, I'm planning to add dialogue options where you can ask about the whereabouts of the girls.