As the murderer of the Nakado clan was arrested, a secret hidden deep in UDI (Unnatural Cause Research Institute) was also revealed.The protagonist of this secret is none other than Rokuro Kube, who was misunderstood by everyone before.He is not an ordinary member of UDI, but an intelligence reporter working undercover.

After the identity of Rokuro Kube was exposed, it caused an uproar within UDI.Resign and go back to school to continue studying.During the summer vacation, he went to UDI again, everyone forgave him, and everyone worked as before.