Thank you chingu. So I looked up the movie and some similiarities
actress plays two different characters (like how in our show There are two NS)
actress gives necklace to guy like how SB did to shin (quote from wiki summary: Before they separate, Joo-hee gives him a necklace, which he keeps close as a precious reminder of their time together.
“Unfortunately, as often happens in affairs of the heart, a third party prevents any deepening of their relationship”; funny how this movie is shown after real NS wakes up and happens to be one replaced in movie theater aka he’s the third party?
”when Ji-hye pensively reveals her mother's story to him, tears stream down his face. Silently he lifts a necklace from around his neck and places it around hers. It is the necklace that Ji-hye's mother, Joo-hee, had given to Joon-ha when they met. The circle is completed: Joo-hee's daughter and Joon-ha's son have fallen in love.” So I’m taking a stretch here, but is it possible that roboshin will give the necklace to NS and he will be one with SB in the end? Trust me I want Roboshin and SB together. But maybe some hybrid human robot is gonna be our happy ending?