Responses
Seo-in had a brother, it's not clear yet whether they were biological brothers or adoptive. He's also the guy yengwoo saw seo-in kissing in the classroom. He probably died sometime before the current timeline since one of the chapters showed seo-in and his family visiting the brothers grave.
Damn, I need to go back. I think I missed that.
I keep reading about a "brother " but whose brother are yall talking about? What did I miss?