Sry my thought process goes bonkers a lot. What I meant was the way soha reacted when she beat yurim and why she quit imediately. Also the things she said to Yurim when they were beaten on her Gayoon, could all lead back to this very problem. Welp that's all I got. Theorizing is fun

Oh crap! that's why sohas so good at punchin, and why she blew up at Yurim that other time with Gayoon. It's cause she's got brother abuse problems, it all makes sense now. All she needed was that little smack and bam! A puzzle complete (unless this is all wrong and I'm just an idiot) but im like 60 percent positive this is what plays out