Knight's and Magic

is a Japanese reincarnation-theme light novel series written by Hisago Amazake-no and illustrated by Kurogin. The series tells the story of a young Japanese man who dies in a car accident and reincarnates as a child in an alternate world where magic and giant robots are real, dedicating himself since then to fulfill his longtime dream of building and piloting his own mecha.

It originated 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 by 8-Bit aired from July to September 2017.

Plot
Knight's & Magic is set in a world where medieval knights use giant robots called Silhouette Knights to fight against demon beasts, magical 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 "Eru" Echavalier, a boy born into a noble family. Tsubasa's previous otaku memories inspire Ernesti into creating his own Silhouette Knights in order to defend his kingdom.

Web Novels
Hisago Amazake-no began publishing the series as a web novel on the Shōsetsuka ni Narō website on October 16, 2010. As of June 7, 2018, ten novels have been published, comprising a total of 143 chapters.

Light Novels
Publisher Shufunotomo acquired the series for print publication, and published the first volume with illustrations by Kurogin under their Hero Bunko imprint in January 2013.

Manga
Artist Takuji Katō began serializing a manga adaptation of the novels in Square Enix's seinen manga magazine Young Gangan on April 15, 2016. Crunchyroll will publish the manga digitally starting on July 5, 2017.

Anime
An anime television series adaptation was announced via a wraparound band on the first volume of the manga on September 24, 2016.The anime aired from July 2 to September 24, 2017. It was directed by Yusuke Yamamoto at 8-Bit, with scripts written by Michiko Yokote, and music composed by Masato Kōda. Fhána performed the opening theme song "Hello!MyWorld!!" and Ayaka Ohashi performed the ending theme song "You & I". Crunchyroll streamed the anime and Funimation has licensed the series in North America.

Trivia

 * Ernie is hailed as a genius. But all his "radical" innovations could have been thought up by anyone; since the inspiration is all around them in the world.
 * it's more surprising that Ernie never said anything along the lines of "not my fault they lacked the imagination" when the Marquis was left flabbergasted by Ernie making these advancements.
 * Kidd is being wooed by the princess of a neighboring kingdom.