Kaiju No. 8

Kaiju No. 8 (怪獣８号, Kaijū 8-gō) or 8Kaijuu is a Japanese manga series written and illustrated by Naoya Matsumoto.

Plot
Kafka, unhappy with the work he has had to do in life, is involved in an unexpected event ...! He becomes a Kaijuu, a monstrous creature, giving him a new chance to achieve what he always dreamed of!