A monster has broken out in Sagamihara! The rookies are tasked with their first mission to kill the remaining beasts in the rear of the unit. Kafka, who was sentenced to be fired if he did not show success within three months, could not hide his excitement at his dream job. Leno is inspired by Kafka and is overwhelmed. And finally the operation began!

In order to save Reno and the others from a mysterious humanoid monster, Kafka transforms into Kaiju No. 8. Just when he was able to defeat the humanoid monster, he decided to face Hoshina, who was chasing Kaiju No. 8! While struggling against Hoshina's onslaught, Kafka hesitates to fight back, fearing that he will fight back and hurt him. Kafka narrowly escapes, but Hoshina feels uncomfortable with the battle.