Academy’s Genius Swordmaster is a Manga/Manhwa/Manhua in (English/Raw) language, Academy series, english chapters have been translated and you can read them here. The Summary is [From the studio that brought you Is this Hero for Real?] Ronan, who had always squandered and lived a life filled with regrets, is given a second chance when his life was about to end in vain. And that chance is when he was sent back to his childhood ten years ago! Ronan makes up his mind to live a new life for the sake of many people who have sacrificed themselves for him.