監獄学園 [Purizun Sukūru] [Prison School] #21

This is the 21st volume of the manga series 'Prison School' (監獄学園), collecting the later chapters of the story as published in Kodansha's Young Magazine. The volume continues the absurd, risqué prison-themed comedy and drama involving the male students of Hachimitsu Academy and their ongoing struggles with the Underground Student Council.