He used to call Jooin his master, now we find out he’s “a dog”. Confusion

canis lupus is the scientific name for dogs

it's so funny that cain is actually a dog and jooin is his master okay now we get it already lmao

Yeah, I know that. I’m just confused who is he and how did he know Jooin before. It doesn’t look like a reincarnation or any kind of magic story