The latest issue of Kodansha‘s Young Magazine revealed that Akira Hiramoto’s Prison School manga will end in the next issue on December 25.
Yen Press has rights to the manga in North America, and describes the series as follows:
Hachimitsu Private Academy was a revered and elite all-girls’ boarding school on the outskirts of Tokyo…once upon a time. But with the new school year comes a revision to school policy: Boys are to be admitted into the student body for the first time ever. But on his first day at Hachimitsu, Kiyoshi Fujino discovers that he’s one of only five boys enrolled at the school. Their numbers overwhelmed by the thousand girls in the student body is it heaven or hell that awaits these five (un)fortunates?!
The Prison School manga series was launched in February 2011 and received its 27th volume in November. As of December 2015, the series has sold more than 7.5 million copies. Prison School also received its first anime adaptation in October 2015, with an additional OVA in March 2016.