Paranoid Mage

A brief description of the manhwa Paranoid Mage:

All of Callum’s life, he has witnessed oddities such as creatures, monsters, and wizards that live among humans in secret. Callum doesn’t want to be a part of it, though, even after he awakens his gateway magic. Every new mage is required by the Guild of Arcane Regulation to provide fealty, education, and service. Nevermind that. They need to catch Callum first if they want him.