Responses
Yes I want so badly to see his head when Taemin will reveal his true identity. I think Joohoon's futur scheme is to see if Taemin will save Jiwook like Siwon did for him and expose his identity. True brother will save him not a stranger.
I don't know why he suddenly cares about his brother and says "I almost lost my brother because of you"
Also he did loose his seemingly sweet and cute brother ☹ but he doesn't know