I don't know for sure as I haven't read it. But it's likely there's the lover boy himself, and perhaps the person he is in love with.
Not having read 'the lover boy short story', I can only guess. The obvious main character would be the lover boy. He is probably the central figure around whom the story revolves. Then, there might be a female or male love interest. There could also be a mentor - like figure, an older person who gives the lover boy advice on love. And there could be a rival, someone who also has an interest in the lover boy's love interest, creating some conflict in the story.
It's hard to say without more context, but it could be the lover boy himself and the object of his affection.
Not having the full details of 'the lover boy story' makes it difficult to name the exact main characters. However, the eponymous lover boy is surely one of the main characters. He could be surrounded by various characters such as a rival in love, a mentor - like figure who gives him advice on love, or a childhood friend who has always been there through his love - related ups and downs.
We can't really say for sure who the main character is in the 'lover boy short story' as we lack information. But generally speaking, it would be a 'lover boy' which implies a male character. He could be from any background, maybe he's a student in a small town who has a crush on a girl in his class, or he could be a young artist in a big city who is drawn to a muse. His character traits would probably include being passionate, a bit naive in love perhaps, and having the courage to pursue his romantic interests within the framework of the short story.
The main character in 'lover boy side story' is likely the lover boy. However, there could be other important characters as well. His love interests would be crucial, as they are the ones with whom he has romantic connections. Additionally, there could be a mentor - like figure who guides him in matters of the heart, or rivals who compete for the attention of his love interests.
Since I haven't read it, I can't say for sure. But likely it includes the main characters from the main 'lover boy' manhwa.
The main character is usually a woman who is haunted by the demon lover. There may be other minor characters like neighbors or family members who are involved in the story peripherally.
Since I don't know the exact 'lover story', it's hard to say. But usually, there would be the two lovers as the main characters, maybe with some supporting characters like their friends or family members.
The invisible boy is the central character. There could be other characters like peers at school. Some of them might be the popular kids who are so self - involved that they don't notice the invisible boy. Then there might be an outcast like himself who he forms a bond with, or a more empathetic character who helps him to become 'visible' again, whether it's through friendship or some other form of connection.
The walking boy is definitely one of the main characters. There could be his family members as well, who might be part of the reason he starts walking. For example, if he has a conflict with his parents, they could be important characters in the background. And then there could be characters in the places he visits. Maybe a shopkeeper in a small town he passes through, or a hermit living in the woods. These characters could interact with the boy and influence his journey.
Most likely, the bad boy himself is one of the main characters. There might also be a teacher or a parent who tries to discipline him.