It is a very new novel with only 2 volumes already out and more coming soon. I am quite certain that it is not licensed in English, I could not find anything that could indicate otherwise.
I got the raws of the two first volumes in Japanese and I am looking for any translators who might be interested in this novel series
Kaze ni Mau Brigandine
風に舞う鎧姫 (ブリガンディ)
Brigandine in the Wind
Author: Koyama Takeru (小山タケル)
Illustrator: Katagiri Hinata (片桐雛太)
Genres: Action, Comedy, Ecchi, Fantasy, Romance, School, Gender bender (cross-dressing guy for the purpose of sneaking in an all girls school I bet)
Description as found on jcafe24
I, Akechi Yoshitaka, am a healthy high school boy. I was invited by my senior to infiltrate Shizuru High School for Girls, yet somehow ended up being chased around by seemingly dangerous female students brandishing swords. One of the girls was actually my childhood friend, Tachibana Minori. She had, in order to save me, slashed the pursuing girls! What an unbelievable thing to do! I thought, yet all the girls remained unharmed. However, in exchange, their skirts had taken the damage and were being torn up...!? That's right, the students of Shizuru Girls High are actually Knights clad in armor (Skirts) that fight in order to take over [Territory] inside the school!! And such is how it was decided that I would also be involved in the battle to become the King of Knights...!! A High Tension Battle-Comedy unfolds!!