There's not a lot of angst though? Like, barely. Hyesung just didn't have much time to discover his own sexuality due to him raising Byeol, so he's discovering that he wants to be closer to Taeyang way more than a friend and that he's sexually attracted to him. Taeyang was always somewhat attracted to him but figured they were not going to be anything more than friends so wanted to keep his distance at the beginning.
There's some things about Taeyang's previous health issues and some pain Hyesung experiences that has something to do with the beginning of the original stories, but there's not a lot of drama for now.
Of course there are not a lot of angst since they are only the wnd couple.
I was just talking about their "trope" and theme or vibes.
Main couple focused on their friendship first and even if the conflict and plot is not as heavy as the 2nd couple, I still think they are more interesting.
While 2nd couple used their trauma and illness as their main plot device. Like dont get me wrong, i like this kind of plot/trope, but because I have read too many of them, I think they are okay. But for me it doesn't make them stand out from the main couple.
I have read the raws, 2nd couple is certainly good! But i still like the main couple more hahahaha.
It's honestly refreshing seeing two innocent people being silly and goofy but still got the story interesting.
2nd couple is good but I have read too many psychological or angst bl that it was just become ordinary for me.