Since I post both here and ao3, I just wanted to share my reply to a comment on ao3 earlier today
I think it's a nice summary/tease for what's to come
"There is definitely still things underlying for the skz group. Unresolved/things they dismiss because they don't think it's worth bringing up. But they all have the people they used to be, the people they became up to the beginning of the story, and the way they all started changing when Han joined and disturbed the settled sand. Like, Han has such a big part into how everything plays out in this story. Not that he means to, but he ends up pushing the boundaries more than skz did without him, and it results in domino effects.
But I think what you're feeling is the hint of tension from skz not being as... open? With each other. Some of it is with the intention to protect, while some is because they are just flawed people and make stupid decisions lol. And walls they built up due to one thing or another. Whereas the Racha group was the opposite. They were closed off, angry, walls up from the start. But over time their walls broke down, and they are so honest and open with each other, even if it hurts, because they will get each other THROUGH the hurt. And, they truly put each OTHER first. Skz all put someone else first. Chan is focused on his leader duties, losing sight of his members to protect the girl. Changbin's focus is coming soon (), Lino is focused on his relative, Han is focused on Lino/Jin Seo, and Jeongin is the only one in skz thinking about skz."