監獄学園 [Purizun Sukūru] [Prison School] #19

This is the 19th volume of the manga series Prison School (監獄学園), collecting the continuation of the story as the students at the formerly all-girls Hachimitsu Academy face further absurd and risqué consequences following their failed escape attempts. Written and illustrated by Akira Hiramoto, this volume advances the intricate, comedic plot involving the school's underground prison and the male protagonists' ongoing struggles with the secretive Underground Student Council.