Prison School Vol 9 Manga English

"Prison School" is a Japanese manga series written and illustrated by Akira Hiramoto. It was serialized in Kodansha's Weekly Young Magazine from February 2011 to December 2017. The manga consists of 277 chapters and is collected into 28 tank?bon volumes.
Vol 9
The story of "Prison School" revolves around five male students who are the first to be admitted to the prestigious Hachimitsu Academy, a formerly all-girls school. However, they quickly find themselves in trouble when they are caught peeping in the girls' bathing area. As a punishment, they are sent to the school's underground prison, which is run by the Underground Student Council, a group of authoritarian and sadistic female students. The series combines elements of comedy, ecchi (sexual humor), and a unique narrative that explores the characters' interactions in a highly unusual and absurd setting.