It's a combination of a kingdom where Caine is king and Moon is queen (you can be the prince/princess, i.e., their child) with the alternate universe of Digital Dungeon Danger. It's set between the 10th and 12th centuries AD (approximately between the years 900 and 1100), choose whichever you prefer. This is NOT set in a digital world, it's in the real world.

Original art: https://x.com/silverpresso/status/1988654211693965537