Tsuyosugite Yūsha Party o Sotsugyō Shita Saikyō Kenshi, Mahō Gakuen demo Aisareru (The Strongest Swordsman Who Moved on From the Hero’s Party Due to Being Too Strong is Well-Loved Even at a Magic Academy) is a new manga by Shiroichi Amaui and Daifuku Ikura and will launch a new manga on January 26!
According to ANN,
The manga centers on Leon, the magic sword user who defeated the demon lord. He decided to move with the changing times, and elects to leave the hero’s party in order to study the new ways of magic at one of the kingdom’s seven magic academies.
There’s not much else to go on aside from that brief description. Shiroichi Amaui also wrote The Hero Life of a (Self-Proclaimed) “Mediocre” Demon! (Jishō! Heibon Mazoku no Eiyū Life – B-kyū Mazoku nanoni Cheat Dungeon o Tsukutte Shimatta Kekka) so if you’re familiar with his work then I’m sure this is exciting news!