
I am sad with the fact that Yoohyun's already dead but I love this interaction, you know?

its still his brother, its just that the one from the future didnt "combined" with the current yoohyun, I think? Like how hyunjae from the present was supposed to mesh with the hyunjae we know.
They kinda explained it before, how the time regression work, like its not exactly time travel?? but like 2 versions being on top of each other and combined? but Im not really sure too ( ̄∇ ̄") I didnt exactly pay much attention to that part

Basically there’s two different versions of Yoohyun, the one who died after that spending 8 years suffering alone building Haeyeon without Yoojin (pre-reg Yoohyun) and the other which was basically a “new” Yoohyun who we know the most of (the one with Yoojin now). Yoojin didn’t turn back time, so there IS a difference between the two and while it may not seem quite relevant since pre-reg is dead I assure you it plays a big role later on

Spoilers!
Yeah I believe yoojin AND current yoohyun both meet the dead, or prereg yoohyun again. Also before this happens, Yoojin tells current Yoohyun about the regression (but he leaves out their estranged relationship/Yoojin suffering which I’m pretty sure leads to some drama when Yoohyun figures out what happened)
Knock,beat his ass and kill him.