Gavin Clark is an ordinary sealer’s assistant, living a dead-end life as half-servant, half-apprentice. But one day, the sealer returns from a trip and brings back... a dragon. The continent’s very first Dragon Sealing Card is born, but with it comes a siege of countless adventurers.

The sealer is defeated in battle, and in his dying moments, teleports Gavin Clark and that one-of-a-kind Dragon Sealing Card away!

With the Dragon Sealing Card in hand, inheriting a unique sealing talent and the dragon power brought by commanding a dragon girl, Gavin Clark starts from the academy, then ventures into the human world, the beastkin world, the sea tribe world—unstoppable!