Follow the friendship between the Nobara family’s pet dog Shiro and a “small dinosaur”. Their connection helps the growth of Shinnosuke and the Kusakabe Defense Squad.

40-years ago, there was a prophecy claiming that in the year of “20” and “23”, two emitting lights would come to the Earth from outer space. And the dark light…

When the five visit a private academy, Kazama is attacked, and left with reduced intelligence and strange bite marks.