Men's Kou

Seihou Private High School, also known as Alcatraz, is a 35-year-old prestigious boarding high school. The school is located on a remote island and can only be visited by boat twice a day and almost impossible by foot. The environment seems perfect for school as students cannot do anything except concentrating on their studies. However, a group of friends became upset that they will be losing their youths and try to get away and find freedom.
(Source: DramaWiki)
~~ Adapted from the manga "Seiho High School Men's!!!" (メンズ校) by Izumi Kaneyoshi (和泉かねよし).