Rakudai kenja no gakuin musō ~nido tensei shita saikyō kenja, 400-nen-go no sekai o maken de musō~ (Associated Names)

After reincarnating in a different world, the great sage Ephthal spent all of his life researching magic. However, he who had aimed to reach the summit of magic, knew of the limits of his talents and fell into despair, thus closing the curtain to his lifetime. However, 400 years later, he reincarnated for the second…