In Japan, kaiju attacks are common, with the Japanese Defense Force fighting against them. After being attacked as children, childhood friends Kafka Hibino and Mina Ashiro both joined the Defense Force to protect their town from kaiju. Despite failing numerous times, Mina became the commander of Third Unit while Kafka was part of Monster Sweeper Inc., a cleanup crew disposing of monster bodies after battles. After becoming infected with a talking monster via his mouth, Kafka gained the ability to transform into Kaiju No. 8 and escape the Defense Force's control. With newfound determination, Kafka decides to fight alongside Mina and finally joins the Defense Force while keeping his abilities secret.
Kafka Hibino, a former aspiring Defense Force member, is now tasked with disp...