あらすじ
Do Kyunwoo is the black sheep of his renowned swordsman family. He cannot even catch a rabbit on his own. On his first day of fifth grade, he meets a tranfer student and recalls his past life. He had reincarnated into the world of a game he used to play called [Brave Hearts]. He was already frustrated that he had reincarnated as a loser, but on top of that, the transfer student is an intermediate/mid-tier boss who will destroy the world!
あらすじはAniListより（英語）。