Jigoku no Sata mo Yokume Shidai

At the boys' dormitory at Hadoma High School, Yohei Goshi is a problem child and a constant source of headache for the teachers. Itsuki Ashiba, the new junior captain of the Judo team and dorm leader, is trusted by everyone at school. Yohei tries to break the rules, but Itsuki always outsmarts him and makes things difficult. When Yohei concocts a plan to get dirt on Itsuki to blackmail him into backing off, things don't go quite as planned. Instead, he finds him in an unexpected situation!

(Source: Renta!)