gyaru_gxrly's Questions (2)

Hey Im looking for a manhwa I read a while back. I remember it having something to do with blood and these two characters who were either blood brothers or adoptive brothers and its like they fall into a giant hole and allat and its kinda apocalyptic and theyre on the run from like the government cuz the younger brother is some kinda monster or something i dont remember

Im looking for a Manhwa. Its a straight manhwa with a tall tanish skinned buff guy. Its submale and domfemale. The girl has dark hair and theres a scene where she spanks the guy