Prologue: EXISTING

Jisoo is on tour with Blackpink, when she runs into someone she thinks is familiar and she wants to only know more about him but she can't seem to find him so she enlists the help of her members and her manager to find him.
As a young child Jisoo had this close friend and they promised to marry each other under a tree in a park somewhere in the world. Following that event a car accident occurred giving Jisoo amnesia can she recover her memories of her childhood and him?