A long time ago, there was one large nation governed by a kingdom of the rice people (a strange species that look like large anthropomorphic rice grains) known for its bountiful rice of high quality. Then, the humans' greed for the kingdom's rice harvest forced the nation to magically transform into a gigantic floating island, drifting high above the earth. Eons passed, and tales of the rice kingdom became nothing more than a legend to humans.

During those times, the rice kingdom fell into a dispute over which rice dish was better and became divided three factions: Onigirazu, Taco Rice, and Omurice. Continued conflict left the kingdom with no choice but to split the floating nation into 3 separate islands with the help of the same magecraft used to escape the hands of humans.

The three islands each governed by its own kingdom soon drifted far apart from each other. What happened to two of kingdoms remains a mystery so far, but the story I'm about to tell begins with the Omurice Kingdom, the domain of the one named Milky Queen.