It isn't easy to move on after losing everything.

Rin Lux understands this better than anyone else. After being cast aside by his friends and family, he decides to wander the world alone in search of truth. Carrying nothing but a wooden flute and a black book on him at all times, he travels under the guise of a musician as he roams from one area to the next. However, everything changes when he is asked to deliver a strange red envelope...

In a world of unbounded magic, humans and other races lived peacefully under the protection of the heavens. Five elements exist, and those adept at bending the natural essences to their will can become powerful mages.

One day, everything changed when the natural essences were disturbed. Evil mana filled the atmosphere, transforming even the most tame into demons. These demons swarmed the world, tearing apart everything in their way. That day is now known as the lost day, the day demons took over half the world.