Well, it's hard to say. It could be that 'a guy like you' is a reference to a certain type of character often found in manga about bums. Or perhaps it's the title of a manga series that involves a guy who's considered a bum. But without more context, it's just speculation.
I have no clue, to be honest. 'A guy like you' could be a description of the main character in a manga focused on bums, or it might be a completely random combination of words. We'd need more information to make sense of it.