This is a game where all you need to do is wait.

You are free to leave the game running while you play something else or watch videos.

An event will definitely occur after 2 hours, so make sure to return at that time.

However, events may also happen earlier. Five minutes before an appearance, the door will open as a signal.

After witnessing an event, you will have 1 minute to open the gallery.

Opening the gallery after an event will unlock an achievement.

Note:

Once you finish, you must start over from the beginning, so be careful not to press Esc by mistake.

Simply staring at the blank screen is recommended only for those who have the spare time.