Hmm so i dont know for sure but it seems like the dragon was evil from the start, i said it because there was a time when that dragon was supposed to train the silver hair girl right? I think he said something along the line of them not matching so he doesnt want to train her and stuff so i assume he see her as a threat since her abilities are able to reach to the sky which is sort of his domain. And about the dream, except for that old monk i dont think anyone remembers what happened in the dream. Like in the dream, black hair ponytail girl told mc that he should try to befriend her again in real life. Its safe to assume the other characters except the monk weren’t really there. So yea.
I just read this, so to assist, dragon guy and and white haired girl have similar way to manifest their power, through electrons (dragon guy power is probably lightning) so since the input of power is the same they will basically fight for the same resource to activate power. Thats why they scraped the idea of both being in the same team.
the monk ability is to manifest dream. So the monk basically created a dream like space and he can manifest people that he knows to teach mc so while mc got close to dream people and the dream people got close to mc and train him, the real them didnt know anything about it bcs the ppl in dream aint the same as irl. Thats why the girl said if they actually met irl, get to know them again so they can get close as they are now like in the dream.
So abt dragon guy being evil from the the beginning, i dont think so. From the wording it seems that dragon guy got corrupted changing his physical attributes from 'truth' to 'error'. Something mustve happened. (Atleast that what i assume im on chap 30+)

can anyone explainn why the dragon hyung suddenly became evil and why sungjin act like a stranger to soyu? cuz the nine monetary train soyu in dream realm right? so everyone should know soyu right?
The story is interesting but it's hard to understand