My Father Is the Number One Under Heaven

Yeo Unhwi lost his family and went mad, living out his final days as a Blood Demon. He believed everything had ended in tragedy—until… “Dad!” A second chance is given to him. Now returned to the time before he lost everything, he vows to devote his entire being to protecting his family. This time, he will not live as a Blood Demon, but as a Martial God! Source: NU