In a universe tormented by horrific, gigantic beasts known as kaiju, Kafka Hibino nurtured the hope of one day joining the Defense Forces to confront these frightening entities. It was a dream he shared with his childhood friend, Mina Ashiro, but their paths diverged. Today, Kafka is responsible for clearing the streets of their troublesome corpses when he crosses paths with Reno Ichikawa. Reno's determination to join the Defense Forces prompts Kafka to get closer to Mina in order to save humanity.