Prison School

Hachimitsu Academy, once an all-girls school, has become co-ed, and teen Kiyoshi is one of five boys to enroll. When he is caught peeping, Kiyoshi is sent to the schools prison, where his punishment is carried out.

Prison School is a 2015 animation comedy movie, starring Hiroshi Kamiya, Katsuyuki Konishi, Daisuke Namikawa. It holds an IMDb rating of 7.5/10 from 10,311 votes and runs 24m.