The Reincarnation of the Strongest Exorcist in Another World - S01

Even as the strongest exorcist at the height of his power, Haruyoshi Kuga wanted more, and that desire led to his death at the hands of those who envied his strength. With his final breath, he casts a spell to reincarnate and vows to become more cunning, hoping his efforts will pay off in his next life. Haruyoshi is soon reborn in another world as Seika Lamprogue, the illegitimate son of a noble family that takes pride in magic. But his new family mostly ignores him because of his lineage and his lack of magical talent. Unbothered, Seika uses knowledge from his past life to gain many valuable allies. As he starts to explore the true limits of his abilities, Seika must also stay alert to the consequences that ruined his past and keep from making the same mistakes again.