Cain is so cute, I must agree, but... Something is fishy. I think this was Cain who write ...

He hiding something but nah I don't think he wrote the blog, he said he will never hurt Jooin so him doing that won't make sense but if is true that be interesting. It doesn't make sense cause he barely knows Korean & about the school blog

Maybe. But then he could comfort Jooin. He already probably fooled Jooin - remember that apartment? In my opinion he knew that Jooin will offer live together, that's why he rented a total hovel.
We could see that Cain isn't only good person (confersation with Yanhwi, his glances). But tbh I don't know, I would prefer that he is good person.

It was revealed recently in today Korean chapter that Cain did not fool Jooin, he was indeed scammed & didn't have enough money get a new apartment, Cain is a good person, his glances & confrontation is something even we would give to someone who is troubling someone we cherish

I don't read Korean chapters, so I don't know:/
In this case, I only hope that the author will not make him a bad person to get rid of him, "explain" why he "lost" to sunbae (I often see this disappointing plot pattern);-;