Prison School (2015)

Hachimitsu Private Academy was once an all-female boarding school, but this is its first year as a co-ed organization. Unfortunately, the five boys who enroll in the first semester find themselves outnumbered by the thousands of girls they're attending school with. Kyoshi is accidentally caught peeping on the girl's locker room on the first day, and he finds himself sent to the prison in the school's basement. Some of the girls aren't too happy to have boys on their elite campus, and the Underground Student Council is willing to whip these new boys into shape if they have to.

Prison School is an anime show featuring Kana Hanazawa and created by Tsutomu Mizushima.

Prison School is currently streaming for free (ad-supported) on Crunchyroll and it's also available on Crunchyroll, Crunchyroll Amazon Channel and Funimation Now.

It is also possible to buy Prison School on Apple TV.