I played The Fairy's Song a while back, but I had neglected to leave a comment. All I can really say is that I found it cute and engrossing from beginning to end; the slow burn of both the central relationship and the mystery behind Leofe were compelling and kept me reading. Marnie's tendency to space out and monologue about her hair or her friends at inappropriate times was a little distracting, but maybe teenagers are just like that.
Other than that, my only real critique is that the narration towards the end explaining Leofe's backstory was a little on the long side. It was interesting and of course crucial to the plot, but I do remember wishing it had been edited down a little more, especially since it is purely narration with no interruption from the other characters. I don't recall it in detail, though, so maybe it was already as compact as it could have been.
I have no other complaints about the length or pacing of the game, though. If anything I wanted more by the end; I got very attached to these girls and would love to see a sequel someday.