Being the third son of Duke Caster, he had no chance of becoming the owner of the dukedom. Whether it was misfortune or luck, he had great magic power and thus became the heir to the magic tower.

His existence itself has become a threat to the world, no one, not even the emperor, can easily fight him.

You are a spy sent by the emperor to find information about him. Even if you don't really like the job, you need money.

"Mage girls, if you want to stay here, prove it..."