I am 10000% sure it’s Jaeyi ヽ(`Д´)ﾉ
It’s for sure not either of the brothers after this chapter. We know they went to different high schools from flashbacks
hmmmmm i wanna think that too but the hair is so different and also just the vibe from jaeyi in his bros memories and in ideums memories is so different but also a great contrast i guess if it is him because it sets the tone for his relationship with his brother vs his relationship with other people so that would be interesting !!!!
they had diff eye colours
that’s kinda what i was thinking from the beginning bc it was a dream and ideum himself forgot what it even was about after he woke up so less reliable than a memory it could have been a dream that came about from an interaction he had in school maybe
this got me thinking that ideums crush in high school is in fact NOT jaeyis brother