Prison school, volume 5 - Akira Hiramoto

The day of the cornered male prisoners' expulsion comes and goes, and the tale takes a new turn as the roiling fates of both the boys and the girls play out Kiyoshi and company finally break out of prison and are hard at work enjoying their peaceful school lives.

but a storm is brewing, and Mari, Meiko, and Hana of the Shadow Student Council find themselves behind bars.