From the information he had on Kim Shin, he knew Young Jae was the other's flatmate. His logic made sense, and he realised that Dusk had always been a quiet one and a responsible soul. He felt guilty for judging Young Jae for the first time in the evening. After all, he owed both Dawn and Dusk for the help they did a few months back.
Wang Chul remembered Young Jae revealed nothing about himself to others until the fateful day. He revealed the pain of being different in the entire family and being hated for it without revealing the details. Wang Chul looked at Young Jae and connected all the dots.
