The girl Remina who reincarnated as a princess of the frontier in a different world of swords and magic. She wants to be an adventurer who travels freely in a different world, making full use of her knowledge and experience from the previous life and working hard at studying and magical training. Meanwhile, in the territory where Remina lived, a catastrophe called [Monster Beat] occurred! Remina and her family became aware of the corruption of the nation after the incident that caused tremendous damage to the territory and the resident.