This song... It is a very beautiful song. It is kind of a connection song with I Need You, Run and BTS Prologue. It's like Jin is telling the story of Butterfly. In the three MV's, Jin is the one who is dead. This song is basically expressing how he doesn't want the good memories (Jin's dreams) to end. In (I think) the prologue, Jin was the one always holding the camera capturing all the good moments and was not one to play with the rest of the members. In Run, at the end you see 6 of the members in the truck right? Then you see 5. That is because Jin wasn't driving, It was Rap monster. Those white lilies you see in I need you (JAP and KOR), those usually represent death or funeral flowers. Jin is always the one around them. It was V I think who was heart broken and couldn't move on right? Jimin. That picture he burned. You see Jin. Then you don't. Why is Jin left out? Because he was dead. So There is more of an explanation on Steven Deng KPOP. This song is Jin's message of saying that he want's to be with his friends forever and that he doesn't wanna leave them. He realizes it's a dream and doesn't want it to end. He is holding on to the dreams and memories because he is afraid it will fly away and vanish like that. So... Yeah...