I mean the author knows what they're doing when they said the genre will change every time taehoon comes close to hobin and from what I have observe when that loyal dog who was trying to make hobin sign the contract he didn’t even denied the he was hobins bf but went with the flow by saying if he's jealous he doesn't seem to be interested in girls too. taehoon I mean and he was so attached to the person who kinda look like hobin the part where hobin went to someone to help him learn something taehoon became possessive to him and that time where he had to clean the gym he had to wear a maid outfit HAHAHHA that was so funny he also comes when hoping in real trouble and cares for him He was previously a real asshole taehoon. but when he meet that guy who looked like hobin he changed a bit but that guy is long gone. so hoping is there to stop him from doing reckless things he doesn't seem to be fighting with others now since he doesn't have the screen time. since he didn't get to protect his friend before he might stay with hobins side forever now saying that it's canon is only from my point of view if u also think they would be canon or not is up to you I'll respect that since this romance story wasn't really about them so sad ╥﹏╥
Im pretty sure that this entire thing just means that the author is poking fun at BL and providing fanservice for the female readers. And Taehoon is just very fond of Hobin (why wouldnt he be, he looks like his dead best friend who he thought he killed.). It doesnt mean that it's canon lmao, theyre not dating. Their relationship is mostly used as a joke/fanservice. Dont get me wrong, I love their relationship, but its not canon.

I know this manghwa is getting heated up but I just want to say and remind you hobin and taehoon is canon HAHAHAHAH