i just noticed that Khan (1) has his ears cropped and Khan (2) have floppy ears, it's very much like how Hajin is being groomed to be an heir + his life is pretty much set in stone to be his father's dog (much like how ear cropping to a dog is very dangerous and why others do it is for cosmetic purposes) and Hajin as Sihyeon where he has more of a freer life and have people around him that makes him feel like he's living.
i just noticed that Khan (1) has his ears cropped and Khan (2) have floppy ears, it's very much like how Hajin is being groomed to be an heir + his life is pretty much set in stone to be his father's dog (much like how ear cropping to a dog is very dangerous and why others do it is for cosmetic purposes) and Hajin as Sihyeon where he has more of a freer life and have people around him that makes him feel like he's living.