Chivalry of a Failed Knight(2015)

series - first aired/released 2015-10-03 - audience 7.1

Directed by Jin Tamamura, Kazuo Nogami

Magic Knights are modern magic-users who fight with weapons converted from their souls. Ikki Kurogane goes to a school for these Magic Knights, but he is the "Failed Knight" or "Worst One" who is failing because he has no magical skills. However, one day, he is challenged to a duel by Stella, a foreign princess and the "Number One" student. In this duel, "the loser must be obedient for life."