Binan Koukou Chikyuu Bouei-bu Love! Game!

The player's character, from here on referred to as the "heroine", was originally a student from Bijou High School - the female counterpart of Binan High School. Due to an unfortunate incident involving a different kind of Loveracelets - one that draws monsters to the wearer - and discovering the alternate identities of the members of the Earth Defense Club, the heroine ends up transferring to Binan High School disguised as a boy.

[from Binan Koukou Chikyuu Bouei-bu Love! Wiki]
Service ended May 10th, 2017.