Mezzo Piano, a Childhood friend of Pinkie Pie's, transfers to Canterlot High after running away from home. She, being the lovely friend she is, introduces him to the Rainbooms. Hilarity ensues, from Pinkie thinking he's attracted to all of them, To Mezzo moving in with Rarity, all is not safe for this High School student...

Edit: After much contemplation I have decided to remove the sex tag, this is so people don't think this is a clop fic, and in all fairness with the mature tag I can pretty much get away with most things, with the way I want the characters to speak. Thanks to 'SudokuBrony' for bringing this up. I've also changed the main characters slightly, only because of how I've decided I want the story to go now that I have started to work on it again. Thank you all and enjoy.
Also as of the recent changes I have updated the genres, nothing too special but I thought it would be something worth mentioning.