Yeah, that'd be so confusing and frightening. Especially since in his mind the image he has of himself is that of a late teenager and Juhwan is a fully grown adult he's supposed to be friends with. Add to that a few vague memories and his own body's reactions that could feel contradictory, poor Yeonsoo.. And for Juhwan, he must be so conflicted trying to adjust and not overstep, while scared out of his mind that Yeonsoo could reject him completely if his memories don't return. Author really had to pull out all the stops for a dramatic ending..

Ok, that muscle memory of automatically hugging your person in your sleep is SO real. T_T I feel so sorry for both of them, navigating amnesia is tough on so many levels.