Haksagwihwan

Against all odds, Ma-Hyun escapes the demonic realm he was trapped in and returns to his family. They’re shocked and overjoyed to find the son they thought dead is alive. They’re even more shocked to discover that his ordeals have transformed him into a martial arts master of incredible skill and power! But Ma-Hyun soon learns that surviving demons and monsters may not be as challenging as adjusting back to a normal life after a decade away, especially as a shadowy organization targets his family...
(Source: Tapas, edited)