Jukokuin no Tensei Boukensha: Saikyou Kensha, Jiyuu ni Ikiru

At a young age, Grameus became infatuated with magic and continued to make a name for himself, eventually giving the title of a Sage. Thanks to his tremendous power, his days were spent in boredom as a do-gooder, helping the people in need and defeating monsters. Tuckered out from such a restraining life, Grameus decides to leave his current life behind, preparing a spell that will let him be reborn 200 years in to the future, while also engraving two "Curse Marks" onto his hand, which act as magic inhibitors to limit his power. Gaining conscience as a the young boy Chris, the former Sage now beings his second life while ensuring he would finally enjoy the freedom he could never taste before. Thus beings the long-awaited manga adaption of the popular novel that steps in after the success of the Cautious Hero tale! (Source: K-Manga)