Rakudai Kenja no Gakuin Musou ~Nidome no Tensei, S-Rank Cheat Majutsushi Boukenroku~

Ephtal, a soul from modern-day Earth, is reborn into a world where magic is an undeniable reality. Determined to master the arcane, he dedicates his entire existence to its study. Yet, despite his unwavering commitment, he comes to a crushing realization: he possesses not a single shred of magical talent. He ultimately meets his end in despair. But death does not claim him permanently. Four hundred years later, Ephtal is reincarnated a second time, still bearing the same name. With all his previous knowledge and accumulated power intact, he steels his resolve and once more embarks on his quest to reach the apex of sorcery.