Kangoku Gakkou nite Monban wo

is a Japanese light novel series written by Furumiya Kuji, with illustrations by Yasumo. The series began publication on July 10, 2014 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"Prison School" ── The worst and worst school that aims to collect and correct only super-dangerous people recognized by the government.

During the 99 consecutive losses of job hunting, it was the notice of hiring the gatekeeper of the prison school that suddenly arrived at the young man Creto who had been withdrawn underground for many years!

"Welcome to Prison School. This is your graveyard .... Maybe."

Kureto begins his job as a gatekeeper under the guidance of Gilia, a girl with excellent grades. However, the school where feather people, beast people, giants, dragon people, old people, and various races gather is just a lawless area !?