Knight's & Magic

Knight's & Magic (ナイツ＆マジック, Naitsu to Majikku) is a light novel series written by Hisago Amazake-no and illustrated by Kurogin. The series began as a web novel before being picked up for print publication by Shufunotomo. A manga adaptation by Takuji Katō is published by Square Enix, and an anime television series adaptation began airing in July 2017.

Plot
Knight's & Magic is set in a world where medieval knights use giant robots called Silhouette Knights to fight against demon beasts, ravenous animals that devour everything on sight. The protagonist is Tsubasa Kurata, a mecha otaku from Japan who gets killed in a car accident. Tsubasa is reincarnated in this new parallel world as Ernesti Echevarria, a boy born into a noble family. Tsubasa's previous otaku memories inspire Ernesti into creating his own Silhouette Knight in order to defend his kingdom.