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?!

Reno's chance to show off the fruits of his Numbers Weapon training arrives when he's ordered to take part in a live kaiju-combat field test. Meanwhile, Iharu, feeling left behind after witnessing Reno's explosive progress, shifts his focus to improving his own skills--that is, until an abnormality strikes Reno during their neutralization mission and forces Iharu into action!