In preparation for the threat of the Demon King's army, Usato, a healing magician, travels on a journey passing letters to ask for cooperation from various countries.

Usato and his group leave Samarial, the land of prayer, and on their way to their next destination, Mirark, they find a town that is not even on the map.

Usato and his friends stop by Rest Valley, a town in a foggy valley, and receive a warm welcome from the townspeople, led by Mena, the innkeeper's daughter.

This town is full of kind people, has no discrimination against subhumans, and has a rich and cultural life, almost like a utopia.

However, there is a hidden secret in this city!?

The long-awaited spin-off comic of the popular battle comedy about a healing magician who breaks common sense has started!!