I'm curious, did the mom know Seo-In and Yeongwoon were in a relationship or did she just think they were friends? I hate her so much! She had to have to known about her other son's actions beforehand and I'm thinking she even encouraged it.
@OpalEyes i think Seo-In's now dead brother assaulted Yeongwoon back the and the mother paid his father to make him shut up, I think that's why Yeongwoon struggles now with anxiety disorder and disappeard from Seo-In back then