My Life as a King is a country/city building simulator in which the player will create a kingdom from the ground up. By using the crystals' power you must build a castle and surrounding town (along with a variety of different shops). Players can expand their kingdom by collecting taxes and hiring adventurers to go on quests.

The story will take place after the events of Final Fantasy Crystal Chronicles, in a remote area of the peaceful world the Crystal Caravans created. The king lost this realm he was reigning because of the Miasma and now tries to revive the country through a mysterious power called "Architecture" that he received from the crystal