Yuukyuu no Gusha Asley no, Kenja no Susume

Asley was expelled from the Magic Academy in his youth and faced scorn from others. He later found a divine medicine that granted him immortality. Seeking vengeance against those who mocked him, he pursued magical research and artifact development distinct from the academy's teachings. Over 5000 years passed, and he became an ancient practitioner of magic. After losing his sense of purpose, he travels with his familiar, Pochi, to explore the world as it has changed over millennia. Following unforeseen events after assisting many people, he now resides at the Magic Academy. The story explores how Asley, who appears young but is 5000 years old, navigates this new chapter in his life.