I've been reading the novel and I am up to 300 chapters. Yun Seora gets hardly mentioned after the first Neutral zone arc. It's a waste seeing how much character development the author has bothered to put into her. The same can be said for Hyun Sangmin and Shin Sang-Ah.
He about to get his revenge on those skele-boys, also i'm assuming he's going to help the girl who's arm is messed up and probably piss off that older woman lol