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.
Overall, 'Do It Next Door' manhwa could be about various themes like love, friendship, or mystery within a neighborhood setting. Maybe there are secrets being uncovered or heartwarming moments shared among the characters.
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.
It might be a coming - of - age story. The boy next door could be going through different life stages, like starting high school, getting his first job, or dealing with family issues. And through his experiences, the narrator learns important life lessons as well.
Once there was a muscle boy who lived next door. He was always outside doing some kind of exercise. One day, my cat got stuck in a tree. I was so worried. But the muscle boy next door saw my distress. He climbed the tree with ease, his strong muscles flexing. He rescued my cat and just smiled and said it was no big deal. Ever since then, we became friends and he would often share his fitness tips with me.
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 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.