So here's what I think so far:
Personally, I understand Yahwi's appeal - he's the cool, sexy and mysterious type of guy that's easy to fall in love with as a character. It's something about the stoic character trope that draws people in; kind of like playing hard to get. And it's obvious that the storyline is going somewhere to explain his shitty attitude towards Jooin too; probably something that happened between them that Jooin doesn't remember.
HOWEVER, I believe that treating Jooin like dog shit is not the correct approach at all, and a lot of what he's doing currently just seems like taking advantage of Jooin's interest. He isn't making any real effort to befriend Jooin, or even show some sign of affection apart from lusting after his body at times - even ignoring his words when they get into the bedroom. So Yahwi's losing a lot of points on the scoreboard right now.
Cain is a cute ball of fluff at the moment who seems very innocent and, although he hasn't outright said it, is very clear with his relationship towards Jooin. The dynamic between them is lovely, and I honestly adore how he's so caring when it comes to Jooin. But I feel like the story is gonna give him some kind of major flaw later down that is gonna completely change our perspectives of him. It's been made kind of evident that Cain feels and understands more than he lets on, especially when his emotions are amplified around Yahwi due to his jealousy. But right now, I think he's doing a lot of a better job dealing with those feelings and thinking about how it might affect Jooin later on.
Meanwhile, Yahwi is just being a major prick without trying to establish the relationship between himself and Jooin as anything definitive, and his actions come across as a toxic, possessive asshole.
That explanation got really long, so in case it was a TL;DR I'm currently on Team Cain! Cain is being a cute fluff ball and Yahwi's acting like a prick.
I see a lot of people siding with either Cain or Yawhi with good arguments and reasons, but based on your personal opinion, who do you prefer? It’ll be like a mini survey lol.
Also...please don’t make it into a battle zone I just wanna know who you like more. (●'◡'●)ノ