Responses

I see, thank you it seems like i was confused but please dont spread misinformation about DID "DID is one of several dissociative disorders. People of any age, ethnicity, gender, and social background can develop DID, but the most significant risk factor is physical, emotional, or sexual abuse during childhood". It CAN form at any point in your life its just more common during childhood.
Source: https://www.medicalnewstoday.com/articles/321462#:~:text=DID%20is%20one%20of%20several,or%20sexual%20abuse%20during%20childhood.
Did Yura hyung struggle with his sexual attraction to Jinsung when he was a minor? That must be so hard to go through especially when you know its disgusting to feel that way towards a kid 6 years younger than you. No wonder he ended up with a personality disorder, he was struggling so badly trying to fix himself and mold his image into Jinsungs ideal hyung that he didn't think to get help. Poor guy.