A modern-day Holy Knight is reincarnated in another world!Aiming to become the strongest with unparalleled swordsmanship and magic!Ichinose Yuto, born as a descendant of the Crusaders of medieval Europe, became the youngest "Holy Knight" and was active in the present world, but he dies protecting his comrades during a battle with assassins.When he wakes up, he finds himself in another world, reincarnated as Luca, the son of a nobleman. He learns swordsmanship and magic alongside El, a slave girl of the same age, and aims to enter Galleric Academy, the world's only academy, and become the strongest magic swordsman in the world...A fantasy heroic tale of a swordsman reincarnated in another world, engaging in fierce battles against demons with his companions!