The story is set in a world years after a young adventurer vanquished the dark lord Diabolos and brought peace to the land. With Diabolos' resurrection, the boy sets out to defeat him again, but has not returned. Now his friend and fellow adventurer Kai sets out to find him and see if what he said is true. Journeying with Kai is Izayoi, a mysterious boy who can communicate with demons, and Jend, a dark elf seeking vengeance against Diabolos for the extinction of his race.

Note: This series went on hiatus in 2002 at 10 volumes. It has been relaunched in 2017
via the MediBang! app.