Kafka wants to clean up the kaiju, but not literally! Will a sudden transformation stand in the way of his dream?

With the highest kaiju appearance rates in the world, Japan is no stranger to attacks from deadly monsters. The Japanese Defense Force, a military organization responsible for neutralizing kaiju, steps in. Kafka Hibino, a kaiju cleaner, has always dreamed of joining the force. But when he is given another chance to realize his childhood dream, he undergoes an unexpected transformation. How can he fight the kaiju now that he has become one himself?

The final trial of the Defense Force has ended, but the challenges for the examinees are not over yet. A mysterious humanoid kaiju resurrects a neutralized honju and attacks Kikuo Shinomiya. When Kikuo seems to have reached her limit, Kafka rushes to defend her! But who is the target of the humanoid kaiju?