Chivalry of a Failed Knight/Rakudai Kishi no Eiyuutan

"Chivalry of a Failed Knight" (Japanese: 落第騎士の英雄譚（キャバルリィ）, Rakudai Kishi no Kyabarurii), also known as "A Tale of Worst One", is a Japanese light novel series written by Riku Misora and illustrated by Won. The story is set in a fantasy world where humans called "Blazers" can manifest their souls into weapons. The protagonist, Ikki Kurogane, is considered a "failed knight" due to his low magical abilities despite attending a school for Mage-Knights. He is forced to share a room with Stella Vermillion, a princess and magic prodigy from another country. Their relationship begins with a misunderstanding that leads to a duel, where the loser must obey the winner. As roommates, they begin training together and developing a romantic relationship while aiming to become great knights. The series has been adapted into manga and anime, with the anime produced by Silver Link and Nexus. The light novel series was published from 2013 to 2023, totaling 19 volumes. It combines action, comedy, romance, school life, and fantasy elements, making it popular among readers.