Tadashii Sekai no Owarasekata: Kokui no Kenshi, Tokyo ni Arawaru

is a Japanese light novel series written by Yagi Uzuki, with illustrations by Nilitsu. The series began publication on June 9, 2017 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"Top secret information was hacked by someone and sent to this school."

While all the students of private Seika High School as well as teachers are gathered at the gymnasium, they are called Kyoko Hinamori with many detectives. The woman begins to tell the amazing truth.

"Soon the civilization of the earth will disappear. If this information is known to the world, panic is inevitable. Leakage is never allowed. We cannot keep those who know the facts alive,"

Hinamori said. At the signal, the detectives took out the submachine gun from the bosom of the coat they were wearing and began shooting. The closed gymnasium turns into hell. Among them, Kanami Akasaki, a first-year high school student, sees a man wearing a skull.

Is the man who appeared at the end of the world a devil or a savior?