落第騎士の英雄譚

A magic too feeble to rank earned Ikki Kurogane the nickname "Worst One" at Hagun Academy, where students called Mage-Knights manifest their souls as weapons. Everything shifts when he is paired as a roommate with transfer student Stella Vermillion, a princess hailed as a once-in-a-generation prodigy. After a clash over their living arrangement, the two agree to a duel that binds their futures together and start training side by side. This manga adapts Riku Misora's light-novel series.