Rakudai Kishi no Cavalry

Rakudai Kishi no  (落第騎士の, A Chivalry of the Failed Knight) is a light novel series by Misora Riku (海空りく) and illustrated by Won (をん). The first volume was released on July 15, 2013.

Synopsis
In a time and place where one's soul can be morphed into a weapon, there are modern-day magicians called Mage-Knights. Although Ikki Kurogane is a student at an institution that trains Mage-Knights, he has no particular talent in magic and is labeled the "Failure Knight" or "Worst One." Getting way less than average marks in the scorings, he was forced to repeat a year. But with the arrival of a new head of the institution, a new rule was created: knights whose abilities are compatible, as decided by the board, must share rooms and attend practice and training together throughout their school years to bring up their abilities to the max. It is a rule to implement the absolute verdict of ability.

Ikki's roommate, Stella Vermillion, turns out to be a princess of a foreign country. Stella is a Rank A knight, the type of genius in magic who only appears once a decade. When Ikki walked in on her while she was changing her clothes, it caused a huge misunderstanding, which eventually ended up in a duel between the two of them. The punishment for the loser is eternal submission to the winner.

Forced to live in the same room and practice magic together throughout all their school years, how will Stella and Ikki's relationship evolve as Ikki proceeds to the top of the Mage Knight world?

Light Novel
Rakudai Kishi no Cavalry is a light novel series written by Misora Riku and illustrated by Won. The series began serialization on July 15, 2013, and had reached thirteen published volumes in Japan as of October 14, 2017, sold under GA Bunko Imprint.

Manga
A manga adaptation of Rakudai Kishi no Cavalry, illustrated by Soramichi Megumu began serialization in 2014 of Gangan Magazine. It ended in December 2017, with a total of 45 chapters that covered the first four Volumes.

Anime
An anime adaptation of Rakudai Kishi no Cavalry has been produced by Silver Link and Nexus under the directorship of Shin Oonuma. A total of twelve episodes were released, detailing the events of the first three volumes. The series was licensed by Sentai Filmworks and also received an English dub.