Saikyou no Ousama, Nidome no Jinsei wa Nani wo Suru? Season 2

After a sudden, mysterious death, King Grey is reborn as Arthur Leywin in a magical world of Dicathen. After being reborn, he still remembers the knowledge of his past life. Growing up, he discovered magic and moulded his future by staying away from things that had previously defined him.