The Boy who drew Cats 5/5

Nezumi!
Set in a derelict temple, at night you hid from the Goblin Rat in the smallest place you could fit into. By day you used your arsenal of drawing equipment to cover the temple walls with pictures of cats. They animated as you slept to kill the rat and his armies.

Mick knew a guy.

One phone call and Seonjo went straight into a job as he left school. Nezumi became a bestseller and merchandise soon filled shelves across the world making the boy that drew cats a millionaire before he was eighteen. He was never called Tohada* again.