
I think min woo is mad cause tae min is someone so strong and to see him in someone so weak he feels angry about the idea and may feel that somewhere seeing taemin in si wo is tainting the memory since tae mins dead(maybe dead) ╮( ̄▽ ̄)╭

I think, his real body somehow died...along with the guy who wanted to die...and min woo for some reason knows that he was run over by truck...or maybe he witnessed it...or his adoptive parents are leadin the hospital...I dunno. So because he reminds him of his dead friend he's pissed..
but it also could be that sth terrible happened in the past between them...he also wondered - why he could remember him, right? :)
Love the story, the sexლ(´ڡ`ლ). But seriously y'all, give the lady who works at the lingerie store props. Her outfits, makeup, nails, and shoes are always on point.(๑•ㅂ•)و✧