Responses
Going into that black room means you are going to be confronted by ur „darkest, twisted“ side.
I don’t think joon will literally come through the mirror and help his friend. He just gave his friend a tip of how to make his problems go away. And to solve that u have to turn insane and accept your darker fucked up side which u will need a black room for…just like it happened with MC and ML.
Basically joon is encouraging his friend join the dark side xd
Oh ok I didn't see it like that it's clear thx to you (づ￣ ³￣)づ
Jun says at the end " when your at a dead end, find a black room" to his friend, does that mean he will help that only remained friend ?