In a room with rainbow painted walls was you, a human. Who were sat upon a large, red, love heart, shaped bed with your arms crossed. While the small winged pony known as Rainbow Dash was sat down before you, who was looking at you with pleading doggy eyes.
"Anon, please. I only need you to power up my butt by shooting your human cum inside my pony butt to save Equestria," she said in a most unusual soft voice.
"No! I don’t want to cum inside an alien horse butt from another universe!" you shouted angrily.
"Come on Anon, don't be a heretic. Cum inside Rainbow Dash’s butt to power it up!" said the small, purple winged horse with a horn atop her head, who was known as Princess Twilight Sparkle from across the room.
"Fuck off Twilight! I don’t want to cum inside a horse butt!" you shouted back.
"It’s pony butt!" she roared, flaring her wings.
"Come on Anon, you’ll love cumming inside my butt. You get pony buttsex and save Equestria through the power of your human cum," said the rainbow horse as she looked at you with bedroom eyes.
"Fuck off you stupid horses! I hate ponies! I’m glad Equestria is going to be destroyed!" you roared, slamming your fist hard down upon the bed.
"How can you say that?! Sure, you can hate ponies! But damming all Equestria into oblivion just because you don’t like pony butts is pure evil!" screamed Twilight.
"I promise you, Anon! This will be the best human on pony buttsex of your life!" said Rainbow as she shook her butt before you, thus giving you a perfect view of her big sexy rump.
Unfortunately, you were not a clopper. So, you did not find the small rainbow horse sexy. Thus, you growled angrily as you crossed your arms while she continued to moon you with her big blue bubble butt.
"I told you! I don’t want to cum inside pony butts!" you roared, glaring daggers at Dashie’s fat horse butt.
"Cum on Anon! Cum inside her butt!" yelled the small purple horse.
"Raahhhaa! I don’t want to cum inside her butt!" you screamed.
"Anon please, we need your human cum inside her magical pony butt in order to save Equestria!" said the small purple horse, with tears in her eyes.
"What?! Why do you need my cum? Can’t you save Equestria some other way?!"
"No, Anon," spoke Twilight in a quiet, calm voice. "The prophecy written by Star Swirl the Bearded said, ‘that a great time of darkness will come over Equestria and the only way to save Equestria is by a human cumming inside a rainbow pegasus’ butt’!"
"But I’m not a clopper! I don’t like pony butts!" you shouted.
"The prophecy also says the human cum must be from a non clopper."
"What?! I don’t care, I’m not cumming inside her butt!"
Suddenly Rainbow Dash stopped shaking her butt before you and turned around to glare at you angrily.
"Anon, Equestria will be destroyed if you don't cum inside my butt! The fate of my entire world depends on you by powering up my butt by cumming inside my butt!" shouted Rainbow Dash with her hooves raised high in exasperation.
"Right, so the prophecy says Dashie’s butt needs human cum inside it to save Equestria?"
Both simply nodded to answer your question.
"So, can't I just donate my sperm?"
"Hey yeah! If you donate, your sperm, then you won’t have to cum inside my--
"No Rainbow Dash!" the purple horse shouted at the rainbow horse. "The prophecy specifically dictates that the human’s penis must ejaculate their cum into your butthole in order to gain the power of Rainbow Buttpower!’"
"But why me? Why not some other human to give her Rainbow Buttpower?!"
"Anon, you are the chosen one to cum inside Rainbow Dash’s butt and give her Rainbow Buttpower! Only your human cum can power up Rainbow Dash’s magical butt to save Equestria!" bellowed the purple horse.
"But I don’t want to cum inside her butt!" you roared, stomping your feet.
"Hurry up and cum inside my butt already you big stupid hairless ape!" the rainbow pony shouted, slamming her hooves hard upon the stone floor. The impact of her hooves created large cracks in the floor, due to her overpowered pony strength.
"But I don’t want to cum inside Rainbow Dash’s butt!" you cried.
"Come on Anon! Cum inside my butt! I need your cum to make me even more overpowered so I can defeat the evil non human fetish dark one with the power of Rainbow Buttpower!"
"Hey I know, what if you transform into a human? Then I’ll gladly cum inside your butt!"
"Heresy!" roared Twilight, pointing a hoof at you.
"Human on human sex is boring!" shouted Rainbow Dash.
"Oh, come on! You can’t seriously expect me to cum inside Rainbow Dash’s pony butt?!"
Tears began to form in Rainbow Dash’s eyes. "Anon…. please cum inside my butt!" she pleaded, her voice low and soft.
"No! I don’t want to cu--- Rainbow lunged forward to wrap herself around your right leg. "Hey, let go!"
"PLEASE ANON! PLEASE CUM INSIDE MY BUTT!" she screamed, tears flowing down her cheeks.
"Look what you’ve done?! You made Rainbow Dash cry! You evil bastard!" roared Twilight, giving you a nasty glare.
"Ah fuck it! Fine! I’ll cum inside her butt!" you shouted with your arms raised high in exasperation.
"Consent!" Rainbow Dash shouted, before diving on top of you, thus knocking you over onto the bed. Once atop you she straddled herself over your body. "Quickly! Remove his clothes!"
"I’m on it!" said purple horse as her horn became surrounded in a purple aura, before there was a blinding flash of light, followed by the disappearance of all your clothes.
Your penis stood tall and proud before the entrance of Rainbow Dash’s butt.
"Uh…. how did my junk get so big?!"
"Horse magic! Now cum inside my butt already!" shouted Dashie.
You sighed, before taking a tight hold of her big blue bubble butt, the soft feel of her ass put the finest of velour to shame. Your finger dug deep into the thick fat of her round pony butt. Then, without a word you thrust your penis into her butt.
The hot, slick insides of her butt tightly hugged your cock as you pushed inch after inch of your long and thick cock into her glorious rainbow horse butt.
"Oh fuck! This feels so amazing! Why am I enjoying this? It’s a pony butt!" you shouted, confused as to why human on horse sex was so good.
"Silly sexy human! It’s because human on pony sex is best sex!" said the purple horse sexfuly as she masturbated vigorously beside you on the bed.
"Come on Anon! We don’t have much time! You must cum inside my butt before it’s too late!" shouted Rainbow Dash in panic, before she began to bounce her big blue butt hard atop you.
You squeezed her beautiful big blue bubble butt with new found resolve. You were the chosen one, the fate of Equestria was at stake. Rainbow Dash, the savior of Equestria began slamming herself up and down your mighty dick harder.
There was a blinding flash of light, followed by the appearance of a bright green alicorn with a fiery mane at the foot of the bed.
"Hah! You’re too late Rainbow Dash!" bellowed a deep evil voice.
"Oh no!" shouted Twilight as you and Rainbow Dash gasped in horror.
"Mwahahaha! It is I, Lord No-humcummer! And I’ve cum to stop you from cumming inside humans! Human and pony sex sucks! Pony and pony sex is best sex!"
And then you came inside Rainbow Dash’s butt. There was a blinding flash of light and Rainbow Dash became a massive, towering all powerful alicorn, that was nearly as big as Princess Celestia.
"No! I was too late!" he screamed in panic.
He shaked his head from side to side, before an evil look crossed his face.
"Hah, I’m still the more overpowered pony alicorn here!" he roared, before he fired two red laser beams from his eyes at her butt… which had no effect on her butt nor the human’s re-hardening cock deep inside her butt. "Oh shit."
“Hah! Evil non fetish misanthropic pony! You are no match for the power of human and pony love!” declared the massive rainbow horse lying atop you.
"Hit it Rainbow Dash! Use the power of Rainbow Buttpower!" said Twilight, giving an evil grin at the evil alicorn.
"TASTE THE RAINBOW BITCH!" roared Rainbow Dash as a rainbow particle beam blasted out from her massive ass, vaporizing the evil non human fetish alicorn into dust.
“So Anon, what do you think of pony butts now?” said Rainbow Dash as she looked down at you with bedroom eyes.
"Oh, Rainbow Dash! I love pony butts!" came your voice low and blissful as you gave her massive ass a tight squeeze, digging in deeply into the thick layer of soft fat from her enormous rump.
"Hey, can I join for a threesome?" said Twilight, beaming at you happily.
"Oh, of course you can!" you said sexfully as you gave her bedroom eyes.
“Yay!” she shouted excitedly, clapping her hooves together.
“Aww yeah! A threesome!” said the massive, towering Rainbow Dash as she looked down at you with bedroom eyes.
And then you had sex with a huge overpowered rainbow alicorn alongside a smaller, far less powerful, slightly less sexy purple alicorn.
The End
