A 2006 comedy manga by Endou Minari and adapted by SHAFT into two anime series in 2009 and 2011.
Androphobic lesbian Miyamae Kanako comes to the Catholic, all-female Ame No Kisaki high school (as a second-year transferee) to find her "true love", which she found in the form of incoming freshman Shidou Mariya, only to discover - much to her horror - that Mariya turns out to be a sadistic crossdresser, who then proceeds to blackmail her into keeping his gender a secret.
