A Genius Martial Arts Girl

Master swordsman Dokgo Hyeon was crushed after being branded as the public enemy of the entire martial world. Broken in body and spirit, Hyeon believes his days and his troubles are finally over... until trouble finds him in the form of Somi, an adorable and unusually gifted little girl who refuses to leave his side. Through Somi, the battle-obsessed warrior who once dreamed of becoming the most feared name in Murim begins to discover the warmth of a heart he never knew existed.

(Source: Webtoon Entertainment)