Siwon died in Taemin's body so yes Taemin will probably be stuck in Siwon's body forever. (Remember when they showed Taemin's body die? Someone was in that body at that time and it makes sense that that person was Siwon. ) As for Jiwook, it looks like he's going to be Joohoon's toy for the foreseeable future. (Joohoon is the psycho bully in case you forgot.)
If that's what going to happen to Jiwook, I feel bad for him. I just hope in extra chapters, he will reflect on what did he do and find happiness. I wanna see the two brothers (Even though, its really Taemin now) have a good relationship. Anyways, thanks for answering my question though
I'll be honest, I love this manhwa very much but the ending didn't satisfy me at all as I have many questions. First, Is Taemin will forever be stuck at Siwoon's body? What's gonna happen to Jiwook now? Is the real Siwon died already?