Cute as far as it goes, but I'm troubled by the sense that the fact that "mister fairy" is a boy is somehow part of the joke? Or perhaps there is only one boy fairy? On the whole I just don't love the name being all about the gender. Outside of the gender thing it's a nice story, but I'm left feeling some discomfort there. If the fairy was named Reginald or Paul or something I don't think I'd have the same reaction.