I loved this episode but I'm a little confused about the fur coat. Does it mean Sang A kill Hwa-Young, or did Hwa-Young get facial surgery to look like Sang A instead of In Joo?
Does it matter? Why are people so obsessed with finding out who he is?
I don't think it's obsession, simply starting discussion. When unseen characters are mentioned in a show that can potentially create conflict for the Leads or are related to villains, I think it's natural to be curious as to who their identity is, even if they don't end up being that relevant to the story.
edit: coughing not nose bleed*