The meaning of the door

Guys the door is intentional, it represents and signifies the first time Jingi’s brother was SA’ed by his uncle. That’s why his brother only had one door when he was placed in a different home because he wasn’t going through his uncles torment and why Jingi’s cousin had the same dyed strand of hair that Jingi made Myung il get to let everyone know that Myung il was being assaulted by him and Heonjae.