In my opinion, I still think they are very important. Uaengphueng's back story is a repeat of what will happen…
Do you know what written in the letter that Kamsaen gave to Fongkaew? Why suddenly Fongkaew made a dress after read the letter? And what exactly Fongkaew searched in Robert's room? She had read it once but i still haven't known what written in it and why it seems so important