The ML is getting annoying with all the childish vibes while pretending so hard to act like an "adult" (and yeah... those feel more like childish tantrums than just some sophisticated "music prodigy's" quirks, to be honest). He is like a young adult who wants to seem all cool and mature, but doesn't realize how he ends up giving himself away with how he will suddenly start acting out like a spoiled brat, out of nowhere (can't even argue he was just being tsundere, when he acted like a quarrelsome little f**er from the very beginning, even parading himself naked all around the apartment, just to antagonize and drive away the mc... *and dude, if you don't want any roommates then why not take it up with your own cousin??*).
He also gives himself away when he fails to figure out obvious stuff like *why* the older guy would be so confused and troubled by what happened between them (not to forget, instigated by the *ml*): He mistakes the mc for being too shallow and casual about what happened between them, when it's obvious *why* the mc is so bent on playing it down, trying to avoid jumping head first into a relationship that might turn out wrong, as he would obviously fear the predictable negative consequences to himself, if it went all wrong (consequences like, losing the new roof over his head, for one... or facing frictions with the older cousin, his hyung from college, for another... let alone, maybe even risking getting accused by the Hyung, of having "taken advantage" of his "adult-aged but still much younger" baby cousin...). And I mean, dude, if you can't figure THAT out...
The ML is getting annoying with all the childish vibes while pretending so hard to act like an "adult" (and yeah... those feel more like childish tantrums than just some sophisticated "music prodigy's" quirks, to be honest). He is like a young adult who wants to seem all cool and mature, but doesn't realize how he ends up giving himself away with how he will suddenly start acting out like a spoiled brat, out of nowhere (can't even argue he was just being tsundere, when he acted like a quarrelsome little f**er from the very beginning, even parading himself naked all around the apartment, just to antagonize and drive away the mc... *and dude, if you don't want any roommates then why not take it up with your own cousin??*).
He also gives himself away when he fails to figure out obvious stuff like *why* the older guy would be so confused and troubled by what happened between them (not to forget, instigated by the *ml*): He mistakes the mc for being too shallow and casual about what happened between them, when it's obvious *why* the mc is so bent on playing it down, trying to avoid jumping head first into a relationship that might turn out wrong, as he would obviously fear the predictable negative consequences to himself, if it went all wrong (consequences like, losing the new roof over his head, for one... or facing frictions with the older cousin, his hyung from college, for another... let alone, maybe even risking getting accused by the Hyung, of having "taken advantage" of his "adult-aged but still much younger" baby cousin...). And I mean, dude, if you can't figure THAT out...
If he doesn't step up his game...