Kafka wants to clean up kaiju, but not literally! Will a sudden metamorphosis stand in the way of his dream? 
With the highest kaiju-emergence rates in the world, Japan is no stranger to attack by deadly monsters. Enter the Japan Defense Force, a military organization tasked with the neutralization of kaiju. Kafka Hibino, a kaiju-corpse cleanup man, has always dreamed of joining the force. But when he gets another shot at achieving his childhood dream, he undergoes an unexpected transformation. How can he fight kaiju now that he's become one himself?! 
Thanks to the efforts of the new generation of soldiers, Kafka makes it in time to save Mina Ashiro from Kaiju No. 9. Not only that, he has a host of improved Defense Force-style combat techniques tailored to fight his enemy. But with Kaiju No. 9 able to access the absorbed Isao Shinomiya and his wealth of martial arts knowledge, will Kafka's refined battle techniques stand a chance?