The Dragon Emperor Becomes A Junior Adventurer

Heath is the giant Dragon of Space-Time and leader of the Demon Race. After he was sealed away in the Ancient War by a human sage, he used his space-time abilities to study the cultures of worlds in other dimensions, becoming a homebody extraordinaire. Yet one day the sage unlocked part of the seal, and Heath set off on a new journey as a junior adventurer, in a world that is familiar yet new to him... (Source: Coolmic)