Botsuraku Yotei no Kizoku dakedo, Hima Datta kara Mahou wo Kiwametemita

没落予定の貴族だけど、暇だったから魔法を極めてみた

While innocently enjoying himself after work, one man’s life changes forever. He wakes in the body of Liam Hamilton, the youngest son of a noble house on the brink of collapse. Amid the chaos, Liam realizes he finally has time to learn and practice magic. Once he begins, it takes his life for an even bigger turn. Can Liam master magic and save his noble family? The aristocratic fantasy begins!

(Source: Crunchyroll)