You quietly walked down the street of Ponyville, while humming down one of your favorite song on Earth. Ever since you 'accidentally' teleported to Equestria, you have no choice but to adapt to the new surrounding and accept your new life. Twilight Sparkle, Princess Celestia personal protege. Personally tour you around Canterlot and Ponyville, you'll find it interesting for these ponies and unknown world. They are friendly and... Well prosperous, You personally never seen any world or country like one, nor do you will find it on Earth.
Still, you are the only one. Only yourself, the only Human race. At first you don't want to stay and asked the two Princesses to teleport you back to Earth as quick as possible. These thoughts fade away overtime as you get to know these ponies more often. Especially at the day you, and Rainbow Dash first dated. You decide to stay here, might be forever with Dash. Biologically, you cannot have baby's on your own and somehow, Twilight tried to find a way for you to have one. Strange it may seem, but hey, look at the bright side. At least you could continue on breeding your own, maybe a hybrid of human or ponies or heck, an Anthro version of Ponies!
....
Either way you lived on normally.
Now things getting a bit more serious with your relationship on Rainbow Dash. You'll see, Rainbow had develop something that she... Uh this might be weird but, she develops a syndrome like a menstrual cycle like any female human on your world. But things are heating up slightly, by slightly it meant a greatly. She's already. Want. You. Inside.
The thing about her 'Horny Period' is that her personality changes dramatically. Complete changes to Rainbow Dash behaviour, how she behave around somepony, and the most importantly. How she acts around you.
Personally, you never seen a Pegasus daring and tomboyish as she is to be feminine rather quickly. She's changing a lot with the new menstrual cycle(it's what you called for the term anyway), more like the 'Heat week' that happen occasionally. Except this time, it was Rainbow Dash herself. She's one of the fastest flier on Equestria, so outrunning her flying speed are... Not the wise choice there is, but its the only one you had.
Good thing is, her period only lasted for a day, it was the same about her personality change. Which is good for you, but not at this time. You want to stay away from the outside and barricade your house, but alas. Rarity require your help to create a new batch of dress she's been working on. Because of the poor timing. You agreed to help Rarity, but at the same time. You forgot this is the day for Rainbow Dash having her 'Horny Period' or you might call it 'Heat Period' to be more precise. Once the day is over, Rainbow Dash will return to her normal self and you can spend time with her normally. Pretty much do all stuff normally without a Pegasus stalking you whenever you are. You really, REALLY don't want to stay in the open for to long, or a storm will get you kicking down on your butt. Literally anyway.
And here you are, walking down the street of Ponyville. Hoping for Rainbow Dash didn't fly up to you and literally humiliate you in public... By making out with you or seduce you with her failed to be feminine voice.
You quickly increased your pace to Rarity's place, the Carousel Boutique. Not gonna lie to yourself, but it sounded like french to you. Hopefully, Rainbow Dash is still sleeping at this hour. Which then you realized, she never sleep at daylight when she's horny. And that! Adds another problem to your list.
You're literally sweating your neck off as you approach Carousel Boutique. Rainbow Dash are nowhere to be on the sky as you walked closer the Boutique, and then you sighed in relieve after you checked the sky to see Rainbow Dash are nowhere to be found in Ponyville. She might sleeping right now, which is good. You knock on the door which then replied with Rarity voice, "Come on in, darling."
You opened the door and stepped inside, and then you'll see Rarity with... Oh god no, please no. That is not the kind of pony you're thinking about right? You're hope are shattered as the pony you've been talking about at starts to speak.
"Oh hey, Anon... It's nice to see you in here," Rainbow Dash said with her seductive voice, and smirking at you as you walked into the boutique.
Oh god, please no... Not again! THIS IS THE WORST. POSSIBLE. THING! Wait just a second here. You now sounded more and more like Rarity over the months now. Considering you helping out Rarity almost like all the time, by either helping with her dress's or carrying stuff that is most likely a box of dress's or just a tool to make one. Good thing is, you were paid otherwise you may never came to help her at all. That is not the time! Right now, look to the mare in front of you.
You tried not to blush as you see Rainbow Dash are wearing a openly dress kind of thing that you don't want to know, Rarity's made with her own hoof of course. Oh god look at those beautiful flank. Oh dammit, Anon. Not now. Hold your imagination of her being on your bed, slowly cuddli- WAIT, WHY DID YOU THINK OF THIS NOW? Calm down Anon, breath slowly... Try to forget her being in here, j-just continue on your work and leave quickly.
Rainbow Dash do a little circle, inspecting her dress and asking Rarity of how it look. And then her eyes locked directly at you, using her most seductive voice she could give at you. "So, how do you think, Anon?"
Oh god... Please no, end my suffering!
Rainbow Dash now are looking straight at you. You tried your best to speak of how awesome, sexy, and gorgeous she was in that dress. The only thing you could spat out of your mouth is the word, "Uuuhhh..."
"It's magnificent, darling. I'm sure any mare are jealous of you," Rarity commented on how great Rainbow Dash dress is.
Still couldn't spat out any word, she trotted next to you and whispered with her failed feminine voice. You found it rather cute though, "Tonight, my love."
You gulped nervously as she rub her body, or more precisely her dress. Into your leg, slowly arousing you. Even though you tried to not get aroused by her action she never gave up, she tried the most daring thing she could've done. Rubbing her flank onto your crotch, clearly signaling you to bid her... sexual needs. You could feel yourself erecting slowly to this.
Thankfully to you, you manage to get off from that situation by the help of Rarity. She cleared her throat, signaling to Rainbow Dash to return. Before Rainbow Dash trotted next to Rarity, she whisper seductively into your ear. "I would love of you making me your love for tonight."
Please not tonight...
You stood quietly, clearly aroused by Rainbows flank as she trotted to Rarity. Rarity, thankfully notice you and quickly instructed you to go upstairs and carry the tools Rarity to where it should be. You let out a thumbs up to Rarity before walking upstairs, which she replied back with a wink.
*** *** ***
Late Afternoon.
After you're done carrying some tools for her dressing tools and stuff that you didn't really know, you quietly makes your way downstairs. Hoping for Rainbow Dash to leave the Boutique early. You peak out to see nopony is downstairs except Rarity having some 'adjustment' to Rainbow Dash dress's.
Rarity was quick to notice you and waved her hooves at you and then she trotted next to you that is still cowering in the stairs, "Have you done moving the tools I instructed to you yesterday, darling?"
You nodded, and ask if Rainbow Dash left already. She replied with a nod and then whisper to you. "I think Rainbow want. You, tonight."
You stand completely still, your face are clearly blushing hot red as she whisper the word to you. You were replied with a giggle from Rarity, saying that you have the cutest face when you are getting aroused.
You gave her your flattest expression you could give to her, "Gee thanks, Rarity."
After a brief goodbye's from Rarity, you quickly increased your pace to your house where you could reside safely from Rainbow Dash. Considering she could be anywhere around Ponyville, hopefully she's not near your place or else... You might pay the consequences. And you don't want to know how you will pay for it.
You slowly crept your way through your house, you awaits for Rainbow Dash to crash into you and gave you some warm kiss she like so much and possibly even rape you in the public as well. Well You know she's daring and all, but you can't imagine she's doing that crazy thing. You shivered as you think about it.
Well, to bad for you. It seems your -- not really -- a wish came true, as Rainbow Dash crashed into you and gave you a hot and soft kiss into your lips. You were surprised for a moment and gently tried to break off the kiss Rainbow Dash force you into. You tried to speak, but all that soft moan from Rainbow Dash clearly wanting you to return the kiss.
"Mmph, Rainbo- MmMpH!" You tried to tell Rainbow Dash to stop it immediately, but her constant and seemingly endless kiss prevent you to tell her.
Rainbow Dash, finally broke off the kiss. Smirking seductively to you, "Did you like it, Anon?"
"Oh, Rainbow... I like it so much," You whisper to her ear. "But can we not do it on public, everyponies are watching."
Just as you said that, Rainbow Dash raised her head to see a small crowd of Ponies watching the two of them kissing on the ground. She laugh nervously as you stood up to your feet and force the crowd to break off.
After you break off the crowd, you turned to Rainbow Dash which is still laughing nervously. You gave her a scolding look which gave her a chill of her own.
"So... Did you not like it?" said Rainbow Dash while smiling awkwardly, you facepalm. You cannot resist seeing the cuteness in front of you.
"No, its not I hate it... But I want you to know your surrounding when you want to kiss," You softly speaks while kneeling on Rainbow Dash to make your position equal to her.
You see Rainbow Dash eye being wet and started to cry. She turn her head else where, clearly to avoid your eye contact.
"Rainbow Dash, I-I..."
Without saying anything, Rainbow Dash quickly flew off to the sky. Leaving you to feel guilty of what you have done, you just don't want her to kiss you out in the open like that. Turns out, you clearly mess things up and worst of all. You make Rainbow Dash cry and also possibly upset her too. In her period too, you clearly fucked up
You slowly make your way to your house, still in pain to see your Rainbow Dash now upset, and probably hate you right now. You couldn't took the guilt out from you, you clearly need to apologize to her. But she's nowhere to be seen, nor she would appear somewhere. She might be on her house in Cloudsdale, or maybe somewhere in the clouds, crying.
Dazed by the event that occurred recently, you opened the door to your house blankly and throw yourself to the couch. Remembering of how Rainbow Dash flew off to cry somewhere, leaving you alone, can't do anything to her. Hugging and stroking her colorful mane might make her feeling better, but you cannot. She refused you to do it, that's why she flew off.
Looking blankly to the picture of you and Rainbow Dash in a sunny day on Ponyville park, oh how much joy you received for spending your time with her. Alas, that is just a memory to you, you're willingly to do anything with her right now. You don't care if she literally rape you in the open, you just want to make her happy again.
You slowly get up from the couch, and head to the kitchen to get a refreshment. Grabbing something that is cold to clear your mind, temporarily forgetting all the stuff that happened so quickly.
After getting some refreshment you needed so badly, you come upstairs to rest for the day. As you walked upstairs, you noticed that the sun had rest on the horizon and soon, it will replaced by the moon that shine the night. You had yourself thinking about Rainbow Dash, the last time you see the sunset was with her and her alone. You closed your eyes and took a moment for yourself to relax, the burden of mixed feelings are slowing you down and it only exhaust yourself in the process. You decide to make it up to Rainbow Dash in the morning.
As you lay your head onto the bedroom, you heard a knock on one of your windows, you quickly get up and walk over the window that had been knocked. You slide the window open to see Rainbow Dash hovering in the air, you can see clearly that she had been crying. She had to, there is no way she wouldn't. Quick emotion change are part the menstrual cycle of her period, basically same thing to the female on your world.
"H-hey, Anon. H-how are you?" said Rainbow Dash, looking away from you. Clearly trying to avoid an eye contact from you.
"Um, I-I'm fine. How about you?" you said, a little nervous. Oh come on Anon, get a hold of yourself and forget what happen last time. This time, make it up with her. Just don't worry about her request for anything, you just have to accept it. For her.
"Oh, I-I'm cool as always. Just a little tired that's all," said Rainbow Dash, swept away few of the tears that still visible.
You hesitate for a moment, thinking if you should- No, just do it Anon!
"W-why don't you come inside?" you said, blushing lightly.
You let Rainbow Dash hover inside to your bedroom... Wait, did you just really invite a mare to your room? Hohoho, you really can't believe it did you? What you just did maybe that is a good idea, or a terrible one. Either way, its way to late to shove her out of your room and into the living room downstairs.
After you let Dashie inside, you both sat down on the bed. Awkwardly sitting close to each other, there was a long silence between the two of you. You really have no idea what to say, remembering that she had her 'Horny Period'. You actually don't know how long her period could last, if you lucky though. Her period would be over by tonight, if you are lucky.
"Sooo," said Rainbow Dash, breaking the awkward silence on the room. She leaned her head close to your ear, whispering softly. "Do you want to invite me to do 'that' kind of thing did you?"
You suddenly felt tensed and you could feel on your cheeks were blushing hot red. "Ummm, uhhh... No?"
Rainbow Dash chuckle and lean even more closer to you, "You know, why don't you take off these clothes?"
OH GOD NOOO!
Well, you already know this was coming sooner or later. You decide not to avoid it and just play with it, besides. This will be your first time with her. Ohohoho, you have dirty mind don't you?
"Mmm, alright. I can do that," you said, while taking off your shirt and throw it to the corner of your room.
Rainbow Dash smiled seductively to you, "Oh, you really are inviting me to do 'that' did you?"
You lean close to kiss her muzzle and whisper softly, "Maybe?"
She chuckled softly and kissed you passionately. You return the kiss, sticking your mouth out to feel the inside of her mouth. Soft moans filled the room, as the two of you fight for dominance over the kiss.
She broke off the kiss, panting softly. "You're a good kisser, Anon."
You kissed her forehead while complimenting of how good that kiss was.
Rainbow Dash smiled mischievously and somehow still looked very seductive, "You know, how about we go to the main attraction?" She rub her hooves to your area of your hips.
You chuckled lightly and take off your pants and throw into the corner of where your shirt was. You're cock was already bulging from your shorts, clearly erected from all of that kiss.
She smiled as she saw it, "Already hard eh? I can work it out if you want."
You smiled back at her, "Please do."
She complied and take off your short, you were quite large and long for most stallion. Well you are a human, not a pony. Surely it was that big, your only thoughts are: Can Rainbow Dash hold such length?
"Wow, you're big. Like it," said Rainbow Dash, smiling upon your cock. "Here I goes."
Rainbow Dash start to work almost immediately, at first licking the tip off and then start to work her way to the bottom. She was amazing at this, not gonna lie. She really put you in a lot of pleasure out of her, begging her to keep going.
It wasn't long as you almost reached your limit, she really put an effort of making you orgasm. "D-dash, I'm almost."
You let out a soft moan as you unload your seed into her mouth. Rainbow, unable to withstand of how many came out, she pushed away from you and then your seed spurt to her face and mane.
She licked off the seed off from her mouth, "Mmm, that was only the beginning. Can you handle more?"
You nodded as Rainbow lay herself onto the bed, you get in position in front of her. "A-are you sure you want me to handle this?"
Rainbow nodded and then gasped as you thrust inside her, slowly pulling out and then thrust it again with more speed. Slowly increasing the pace each thrust. Rainbow moan start to get louder as you thrust faster,
"AH YES!" exclaimed Rainbow Dash as you thrust into her sensitive spot. You slowed down your pace and finally stopping entirely, leaving Rainbow confused. "W-why did you sto-AAAAHH!"
Rainbow screamed in pleasure as you make a powerful thrust inside her and increased your thrusting pace once again. You see Rainbow shivered, indicating her climax. You slowed down your thrust, allowing yourself and Rainbow to take a breather.
"L-lets try another position," said Rainbow Dash, panting heavily and changing her position.
You are now facing her beautiful flank, you grabbed her flank and rubbing your cock onto her rump before taking it inside. Again, Rainbow Dash gasped of how big you are inside of her. Her vagina really clamping down on you, she gotten a little tighter than the last time. Oh what the hell, you're enjoying this did you? Even though you hurt her awhile ago? SHAME. Meh who cares? You don't, She's not complaining and you two are having your first intimate time together. What more do you want? Slap her right at the flank!
"Ah, yes... Do it more!" exclaimed Rainbow, asking and begging you to slap her again, which you did and she enjoy it very much. Your thrust on your hips were much more faster than before at the previous position, an ecstasy and the sound of a blissful moan made you reaching your second climax in matter of minutes. You tried to hold yours as long as you could, but you approach it even more quickly.
You quickly inform Rainbow Dash about your approaching climax, "D-dashie, I'm gonna..."
Rainbow gave you a look in the eye and nodded, "L-lets do it together!"
You really want to ask if she want you to came inside her, oh what the hell Anon! That is not the right time, to be honest. It was impossible to impregnate her, you both are from a different species. No way your seed could- You've better stop this thinking at once because it only makes you confused the hell out.
You both reached climax together, releasing your seed inside of her. The 'love juice' quickly poured down out of her, clearly overloaded by the ammount of 'love juice'. You drop yourself to Rainbow Dash, panting heavily. You two are covered with sweat and love, you do not heed as you kissed her cheeks. You are technically still inside, in case she want another round.
"A-anon?" whisper Rainbow Dash. "I want to ask you something."
Oh god, please don't bring that incident back up now. This is the WORST. POSSIBLE. THING! Again with the over dramatic feeling of Rarity, you really need to hang out with the other ponies really soon.
She leaned closer to your ear, whatever she want to ask you. You're ready for anything. "Do you want a colt, or a filly?"
Oh.....
That was weird.....
You really didn't expect that.....
..........
Realization dawned as your jaw dropped down, shouting the word "WHAAAT!" afterwards.
Meanwhile...
Somewhere on Java, the Main Island of Indonesia. South East Asia.
Somewhere on a small state, there was a young adult thinking in front of his own Computer.
"Why did I write this clopfic again?"
Author's Note
Now I required a bleach poured to my brain for writing this. xD
This is just so wrong... And not gonna lie. It took me more than a week to write this, writing and having ideas for this. I just had the best picture for Rainbow Dash and Anon havin-
Oh, my dirty Imagination of you Rainbow Dash 
Anyway, cheers and thank you.
