Agata Katsuhira is a strange young man who doesn't feel pain. One day, he encounters a mysterious young woman named Sonozaki Noriko, who changes his life, as well as the lives of his classmates forever.
The kids are forced into doing self introductions... However, it appears that the self introductions that Sonozaki wants them to do requires much more than the usual name and what class they're in. They find out that every wrong answer has a penalty, and painfully learn that they are indeed connected to each other...
The kids find out that there's actually one other Kiznaiver, and they go to find this mysterious figure.
The kids get to know Hisomu and Sonozaki promises to let them know a secret about Kiznaivers if they agree to go to a summer training camp.