This is one drama that have all the characters are evil. All of them are abusive, vindictive, manipulative and cold to the ML. Everyone contributed in creating the "Devil". ML was deemed a monster since birth, just because his mother died during childbirth. And growing up in a very harsh environment, surrounded by very cruel people. No one had ever showed him sincere care and love. So how can he understand love if he never experienced it? All ML do was trying to survive using his logic, the logic of a person that knows only suffering, cruelty and pain.