Where is this going?

A lot has happened but I dont really know where the story is heading. It just feels like we're watching a lot of filler.Ae-sol annoyed me so much here. Why do writers like making characters act stupid? Now I get why Bora was always hating on her.Not surprised a, for lack of a better word, "betrayer" plot line is also going on cos in shows like these there is always someone that's trying to sabotage or has their own agenda. Very curious to see what Soo-cheol's goals were.