The Merchant and the Mermaid

Grantt Luca de Vand is a Monster Country Emperor who run-away from his duty as an Emperor of Kingdom of Karg, just to look for whatever he wants to do as a normal citizen. Grantt Luca just wanted to have a tour around the world and pretended to be a wandering mage. But then, he found himself roaming around in a human country and unexpectedly, he became a merchant and later-on became friends with a dress maniac mermaid. He is the strongest monster to ever exist in the history of his kingdom who was blessed with different kinds of superpowers due to the genes of his ancestors. He became a normal citizen of Country Nether and hides his power.