Sei Abelia Jogakuin

is a japanese manga series written by Shimai Yamada. It began serialisation in the October 2010 issue of Manga Time Kirara Forward.

The series was released under 1 volume in October 2011.

Synopsis
Tsukuba Tokonatsu enrolls in the prestigious girls' school, St. Abelia Girls' Academy. But there she discovers an amazing secret. It was "a boy is mixed in the students of this school". With the suspicion of who ...!?, She begins to have mixed emotions with her classmate Nadeshiko ... A thrilling fantasy story weaving in a maiden's garden !!

(Source: Amazon JP - Translated)