Rachel could be a great character to pair with the boy next door. She's ambitious and talented, and their relationship could be full of musical duels and passionate arguments about art. They could both push each other to be better singers and performers.
Well, it might be. There could be unexplained noises, strange lights, or feelings of unease in the house next door that lead people to think it's a ghost story. Maybe previous occupants had some spooky experiences, like objects moving on their own or cold spots. But it could also be just superstition or misunderstandings of normal house noises and drafts.
I'm not sure specifically as I haven't read it in detail. But generally, it might be a story about the relationship between Lola and the boy next door, perhaps a coming - of - age story with elements of friendship, first love, and self - discovery.
It's hard to say for sure. Manhwa often have twist and turns. The boy next door could be a vampire if the story takes a supernatural turn and reveals it later on.
It's not impossible. Manga creators often come up with unique and surprising twists, so the boy next door could totally be a vampire. It could add an exciting element to the story.