A narrative set in a dream world that depicts the Kasukabe Defense Forces and the Nohara Family battling nightmarish peril. After having a bizarre dream in which a big fish consumes them, the residents of Kasukabe come to be able to have dreams they wish in their sleep one day. People in the dream world appreciate having their own personal dream, but the world progressively transforms into a nightmare world. Shinnosuke Nohara and Kasukabe Defense Forces members allow Saki Nubatama, a Kasukabe resident, to join the group, and they enter the dream realm to investigate the origin of the nightmare.