[COMPLETE]
This is a clopfic, male and female - straight, between a human and the changeling pony Queen Chrysalis.
As for the Cutie Mark Crusaders, they stumble onto the action completely on accident - getting caught up in the intense sex themselves. As terrible as this may sound, you must take their virginity, all three of them, to prove yourself to your new Queen. Thankfully, the little fillies aren't going to get terribly hurt, but that's all I'll say about them. (I originally wasn't going to include them, but now that I've thought of it, I must! I'm sorry!)

This clopfic is pretty vanilla other than the fillies - there's foreplay and vaginal, anal and oral sex, that's all. No sick stuff like goo, or fucking the leg holes, or tentacles in your ass... er, don't ask about that last one)
Four chapters unless support for this is high. First is an introduction to the clopfic, second is the romance and clopping, third is the entrance of the CMCs and more clopping, then the finale - which will definitely have clopping.

You've met her once. The Queen of the changelings, Chrysalis, the pony with holes in her legs, beautiful blue hair, a piercing green-eyed gaze, and a slightly-bent-looking horn coming out of her forehead. At the royal Canterlot wedding between Princess Cadance and Shining Armor, you met her briefly after the invasion on Equestria began. While everyone was panicking and trotting every which way, the Queen was in front of you, inviting you to her humble cave home. Transfixed by what you saw, you couldn't help but notice your heart miss a beat at that moment. She left you with a small kiss; maybe signifying something greater. After Shining Armor had defeated Chrysalis with the power of his love, you couldn't help but wonder what that 'greater' meant. So while everyone was talking about how exciting and scary the wedding had been, you were already on your way to the caves she had mentioned. By this time, everyone had already accepted that you were a human. You came to this land a long time ago, with the help of a crazy scientist you're ashamed to remember.

[E6: The special chapters are bonuses. They'd be more of a fanservice, a continuation from the moment the story left off, just lots more sex. Story? Nah, unless you count 'threesome with the CMCs' and then 'seven-some with all of them' as actual plot points. That's right - hot threesome with all the fillies and then with the Queen and three special guests added in. BONUSES, 'KAY? BONUSES. NOT REAL CHAPTERS. By the by, one chapter's objective has been fulfilled. Now just the Drop the (b)Ass one..]