Manghyangmusa 

The Ghost Wolf of the Battlefield howls in the Murim!’ So Cheon-Ho returns to his homeland after a decade of war and learns that his father has passed away and his disciple-brother, who was no different from his family, had disappeared without a trace! He briefly spends pleasant days with his childhood friend, So-Hyae, but is entrusted with her daughter, Hui-Yeon before she dies of a disease. Cheon-Ho, who has lost everything, starts an endless war against the Martial Artists in order to protect Hui-Yeon… A macho man with an unbreakable constitution and overwhelming power. He puts everything on the line to protect the child of the woman he loved! (Source: KakaoPage, translated) Note: Includes one extra chapter.