Other name: Prison School OAD; Kangoku Gakuen OVA; 監獄学園[プリズンスクール] OAD
Genres: Comedy, Ecchi, OVA, Romance, School, Seinen
Date aired: Mar 4, 2016
Summary:The OVA featured the previously unanimated "Mad Wax" arc from the manga. Bundled with a limited edition of the manga's 20th volume.