What's childish is not to realize that it wasn't a promise "made with no real intentions" to the ML because the MC never gave any indication that it wasn't serious. Just because the MC did wrong by making that promise and forgetting doesn't make it mls fault for taking it seriously. They both suck at communicating.
he was laughing while talking about that promise, even someone who doesn't know a thing about expressions can say that he wasn't being serious, the ml literally acts like a kid, yuhyeon have always said that he didn't want to be with an alpha, I don't see any problem with his communication skills, he was clear with his words
Way to tell us you're toxic as shit and think it's okay to strong people along while knowing the truth
if he's really serious about that "promise" and trying to do something he can be more blunt about it, he just acts like a kid, I don't even trust him fully because his way of thinking is genuinely stupid how can somebody expect other to remember a promise made with no real intentions and as a joke, it's childish