So... is Prison School finished or not?
NO, it is not finished.
Why?
We found unfinished non-core content:
Kyoaku Gakuen (Other)
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Prison School
監獄学園〈プリズンスクール〉
Anime - Base
Release date: July 11, 2015
Prison School: Mad Wax
監獄学園[プリズンスクール] マッドワックス
Anime - Sequel
Release date: March 04, 2016
Synopsis
Hachimitsu Private Academy, formerly an all-girls school, opens its doors to male students for the first time. Five boys, Kiyoshi, Gakuto, Shingo, Andre, and Jo, enroll, finding themselves vastly outnumbered.
Struggling to connect with the overwhelming number of female students, the boys attempt a risky prank: peeping into the girls' bath.
Their plan fails, leading to their imprisonment by the strict Underground Student Council. They are sentenced to a month in the school's prison.
The anime follows the boys' experiences as they endure their harsh prison sentence, focusing on the challenges to their friendship and their struggle for survival in this unusual situation. Will they survive their sentence?