Thought I'd add my thoughts on Tae since there's a debate going on (and like the other anon I just wanna say that I love your work and this isn't criticism! I love that the characters are complex and have flaws because humans are like that). I like Tae, I think it's obvious how much he genuinely loves his brother and wants what's best for him. The scene where they were cuddling and YG confided in him was so sweet!

But I do agree that Tae is babying YG a little too much, which they talked a bit about and he did recognize that iirc? And so I like that fact, but I think he does still have to work on it a bit. But I also think that YG is at fault bc they haven't had enough of a conversation about that. I get Tae is a big bro and that they have a bit of an age gap but the gap isn't /that/ big, so while I get it, I also think it's important to note that it's on YG to communicate and establish boundaries with his brother about how he wants to be treated. So, basically, I think they just need to talk a bit more about things in general lol

And, I think it's fair that YG doesn't want to talk too much about his boyfriend or introduce him to his brother, because they're relationship is really new and they're allowed to have time for themselves to settle into things. The problem in their case is that YG's boyfriend is his brother's best friend. Obviously the way they started seeing each other isn't the best, especially since they kept it a secret, but things are going well now and there are genuine feelings on both sides so I think once they explain all of that, Tae will understand. He'll still be hurt, which is totally valid, but I don't think he's the type to have a huge blow up and want them to break up or to stop being close with either of them. Tae is more mature than that, and he genuinely loves both YG and JK and wants them to be happy, imo

(sorry this was so long lol i'm living for this au though, it's so great! thanks for writing it yuyu <3)