According to the holy texts, the world used to be completely black. There was nothing and no one until The One appeared, and with their appearance light was brought into the world. The black was replaced with a heavenly white, a white that covered everything and made all feel enchanted. The One saw it, and saw that it was good.

But then sin crept into the world, corrupting The One's creations with evil and malice. Sin would disguise itself as part of The One's creation, covering itself with white and pretending it was good. That was when it would attack, destroying good and crushing it under its might.

The One saw this, and saw that it was bad. They permanently separated good from sin, pushing them into their own separate realms. The ground made of good was to be known as Land, a place of light and happiness where humanfolk were meant to live. And the sin that disguised itself as good was banished to become Sky, a place that hangs directly above Land. It may have looked a pretty white, exactly like Land below it, but no humanfolk must ever touch Sky. If they did it was said that sin would corrupt them, and only the good of true Land could save them.

Or at least, that was what Caitlin was told.

Caitlin, like all of the humanfolk they knew, had lived their entire life on Land. Humanfolk were all made in the image of The One, so despite the name they are vastly different from humans. By human standards many of them are incredibly pale, with shiny skin that would make them look like glass. Their hair was as white as snow, Caitlin's tied up in two large braids. Their eyes would either come in a shiny bright gold or cool silver, Caitlin's being gold. Their bodies were incredibly short, with Caitlin only reaching three feet tall. The tallest humanfolk recorded was just 4'01" and most don't even get that tall.

But there are two incredibly important things that define humanfolk. First is that the humanfolk are a one-gender race, possessing elements of both males and females. Their breasts were just as big as their heads at their smallest, Caitlin being rather stacked compared to their peers. They all had penises that were also massive in comparison to their bodies, Caitlin's being so big they just had to bend their head to suck themself off. Their bodies were so incredibly durable that sex with such oversized genitals didn't cause any pain, even if they could see the bulge such massive shafts made sometimes.
The other notable thing about the humanfolk was their ability to fly. It wasn't truly flight in the traditional sense; nearly every creature The One created was able to manipulate their own gravity on some way. For the humanfolk that meant they could soar through the air as fast as they wanted, though they always made sure to land on Land by the end. Despite the ability to no one wanted to end up with their feet touching Sky, for that was a place of sin.

If one wanted to remove themselves of sin, the Church of The One was where they would go. This was where Caitlin would go to work, acting as a nun that spoke to the general public. Anyone that felt like they had done something wrong or against The One's teachings would come to Caitlin, where they would purify them of sin. And how did this process go?

"Oh Caitlin, I can feel it! I can feel the sin leaving my body!" A humanfolk on all fours couldn't help but scream in pleasure as Caitlin pumped their dick in and out of their pussy.

"The semen that's about to enter you is pure white," Caitlin said, calm despite their intense level of arousal. "White like the pure blood of The One, which is about to clear you of sin and make the mind inside clean again. As you take this semen, your inside will be clean, and you shall no longer be a person of sin. Are you ready to take The One's blessing?"

"I... I'm ready!"

"Then shall you be cleansed!" With one more thrust, a flood of semen filled the fellow humanfolk, making them orgasm as well and cum on the floor below. Such a ritual should purify the sinner from within and make them see the light, or at least that was what Caitlin was told.

"Thanks!" Clean up was quick and easy, allowing the humanfolk to leave right away.

"It is only my duty," Caitlin said with a bow. "If our experience leads you to bearing a child, remember that it's a gift from The One helping you to stay on the right path."

The person nodded and left, leaving Caitlin alone at the church.

Caitlin found themself alone at the church quite often. Many of the other nuns couldn't compare to Caitlin's sexual prowess, so many of them left one by one. The priest was not one to frequent the place often, so a situation like this wasn't uncommon.

Caitlin didn't mind, though. They didn't mind being alone. Now that they didn't have purification duties to take care of they could get a few chores done. They quickly flew by their house to hang some of the laundry up to dry, while folding up the dry laundry and putting it away. They then proceeded to wash their dishes and set their table, they was planning to have some friends over for dinner after work today. And they had almost forgot, they needed to get some fruit for the pie they were planning to make. They flew out of their house in search of floatberries, ready to make floatberry pie.

Floatberries tended to grow in the middle of the air, floating in a space between Sky and Land. As a nun Caitlin didn't often float that high, feeling intimidated every time they got close to Sky, but they did float by whenever they needed floatberries. And there was a bush right above their house, so they just had to fly right above in order to...

Caitlin almost forgot why they were there. They were right by the floatberries, they were easily able to grab the food they wanted, but the sight of another humanfolk floating above distracted them. They were around the same height as Caitlin, and probably similar physical sizes as well. Their white hair was tied up in a long ponytail, and their eyes were a cool and shining silver.

Caitlin was just stunned for a moment, until they forced themselves to speak.

"You were looking for floatberries as well? Me too!"
The two accidentally spoke at the same time, causing both of them to laugh.

"I'm Caitlin." Caitlin extended their hand to the upside-down humanfolk. "What's yours?"

"I'm Kaelin." Kaelin returned the handshake strong and firm. "I don't often come across others near this bush."

"Same here, though I don't usually come around this time either. Are you here often?"

"Yeah. I decided to rush by here today because of a pie I promised to make some pals."

The two talked for a while and found out they had a lot of stuff in common. Very similar interests, similar homelives, the two even both worked as nuns, albeit at separate churches. They were of the same faith though, and they both had similar fears about how this area was just a bit too close to Sky. It made Caitlin relieved to know there was someone with similar views and fears to them, making them lose track of the time.

"By The One, it's getting late!" Caitlin finally noticed the time. "My friends must be waiting for me by now!"

"You're right!" Kaelin was just as shocked. "I was enjoying myself so much I forgot to keep track of time!"

"Guess that's another thing we have in common. Want to meet back here again sometime?"

"I'd love to!"

After the two shook hands, they immediately flew off into separate directions. They left so quickly, in such a hurry to entertain their guests, that neither noticed where the other was truly going...

The dinner came and went, but Caitlin couldn't help but think about Kaelin. It had only been a few minutes, but without them, it didn't truly feel like all of their friends were with them then. They kept thinking about them into the night, and even as they purified sinners during the next day. Their heart pounded with anticipation whenever they thought about Kaelin; they just knew they had to see them again.

So the first thing they did after the church closed was fly straight towards the floatberry bush above their house. They didn't even bother changing out of their nun's habit, figuring that Kaelin wouldn't mind the clothes.
And just as they arrived they smiled, for who else had just arrived but Kaelin themself.

"You couldn't wait too!?"
"You couldn't wait too!?"

The two spoke the same thing at the same time, making them laugh hysterically. This day was going to be great.

And indeed it was. The two talked for hours on end about too many things to count. Hours seemed to fly by like mere minutes as they conversed with each other, making the two wish that this could last forever.

"I should visit you sometime," Caitlin said. "Then you could teach me to make those special floatberry muffins you talk about."

"Oh you can visit anytime you want," Kaelin said with a smile. "My house is right below this floatberry bush so come anytime!"

Caitlin froze. Caitlin's house was right below the floatberry bush, and they had never seen anyone that looked like Kaelin in the neighborhood. And the way Kaelin described it gave the impression their house was directly under the bush, which wouldn't be possible since that was where Caitlin's house was. Maybe it would be true if they meant down from a different perspective, but that would imply a house built on Sky...

They must've been overthinking this. Maybe Kaelin just doesn't go out much. Maybe they didn't even know there was a floatberry bush here until recently. There could be a million things that explained this situation. They shouldn't automatically assume something as crazy as their new friend living on Sky. That was what Caitlin told themself.

"Nice to know," Caitlin said. "But can you take me there? I want to be sure I have the right house."

"Oh sure." Kaelin took them by the hand and flew them towards their house.

Kaelin flew up.

"STOP!" Caitlin broke themself free of their new friend's hand, floating back down closer to Land where they felt safer. They were left shivering. This was the closest they had ever been to Sky, and the sight made Kaelin sick as well.

"Wait a moment," Kaelin said, unnerved.

"My hunch was right," Caitlin said, shivering.

"You live in Sky!?"
"You live in Sky!!"

The two spoke the same thing at the same time, making them shiver in fear and disgust.

"You actually believe that Land is Sky," Caitlin said. "The sin of Sky must've possessed you to believe such a thing!"

"Are you okay!?" Kaelin seemed genuinely concerned. "The Sky corrupted your thoughts and made you believe that's Land!"

"Because it is Land! You can't be a nun of the church with you body infested with Sky sin!"

"That's what I should be saying! You need to get away from Sky and get on Land immediately!"

Caitlin groaned. Their words clearly weren't reaching Kaelin, which was likely a result of Sky's sin fully infecting them. It felt more disappointing than anything, knowing that this new friend had already succumbed to something so wrong. If only they could help them somehow.

Caitlin grew determined, immediately realizing there was something they could do to help. They were still in their nun's habit after all, it was their duty to purify the sin from the sinners. With their dick, Caitlin could bring Kaelin back into the light, and they would bring Kaelin back into the light.

"Kaelin." Caitlin lifted the bottom of their robes, letting their massive cock grow from underneath. "It looks like you need to be purified."

"Caitlin." Kaelin lifted the bottom of their robes, exposing her massive cock to their former friend. "It seems like I have to purify you."

The two floated towards each other, then moved each other's pants out of the way to expose each other's pussies. Their cocks were pointed right towards each other's pussies, ready to make the plunge at any moment. Neither had done such a thing with someone they had considered a friend, and the fact that this had to be done was a bit disheartening. It was hard for them to bring themselves to penetrate each other, but eventually they just did.

Their cocks entered each other at the same time, making the both of them flinch. Both of them have always been the ones purifying and not the ones getting purified, so getting penetrated was a brand new experience to them. It felt a bit unreal, taking such an incredibly large shaft into the body, but somehow it ended up fitting perfectly.

"You're the one who needs to be purified," Caitlin growled. "Get that thing out of me."

"You don't even realize who's full of sin here," Kaelin growled. "You truly need purification."

"The light of Sky may have tempted you, but it isn't true light. Come down to Land and free yourself of sin."

"You may think you're walking on a surface of truth, but it's truly made of lies. Never return to Sky and come to Land."

In and out, in and out, they thrusted into each other over and over again. They could feel each other's cocks push incredibly deep, nearly pressing their wombs each time. It made them wince, their pussies felt great, their cocks felt great, every part of them was drowning in ecstasy. Yet as they looked at each other's faces they quickly realized that this wasn't working.

"Sky has corrupted you too much," Kaelin said with disappointment. "My purification is having no effect."

"At this point, only true Land could save you," Caitlin said with disappointment. "Come and be removed of sin."

The two repositioned their bodies so that the person they were saving was between themselves and Land, or at least what they perceived to be Land. Their large breasts pressed together, making them shiver a little bit from the contact. Their nipples grew hard beneath their robes, pressing into each other. Their cocks grew within each other's pussies, more aroused by the contact.

"Now, be purified!"
"Now, be purified!"

The two pushed, doing their best to push their opponent to the Land below them. Their breasts flattened completely, their cocks smashed into their wombs from the force, and the pleasure that filled their bodies rapidly increased. Neither moved an inch, only shivering as they tried the hardest they could to move each other even the slightest inch.

"Don't let sin consume you," Caitlin said as she thrusted down as hard as she could. "Come down and take your rightful place on Land."

"Sin has prevented you from realizing where true Land is," Kaelin said as she thrusted down as hard as she could. "Come down right now."

"That is Sky. True land is down here."

"No it's not. Land is truly down here."

"Stop resisting." Caitlin grunted as she pressed as hard as she could into Kaelin, squeezing their bodies tighter together.

"Stop resisting." Kaelin grunted as she pressed as hard as she could into Caitlin, shoving their cocks into each other.

"Now, be removed of sin!"
"Now, be removed of sin!"

The two came within each other, a great orgasm overtaking them both. Intense streams of cum poured out and into each other, the purifying white liquids filling them up completely. Not once had they cum this much, it was a testament to how perfectly their cocks fit each other's pussies.

"Now, do you see the light?"
"Now, do you see the light?"

The two frowned as they heard such words, knowing that it meant their plan didn't work.

"You are clearly not pure," Caitlin said. "You need to touch Land."

"You need to touch Land," Kaelin said. "The sin had still corrupted you."

"I shall cleanse you of sin!"
"I shall cleanse you of sin!"

Ironically, neither touched Land for a long while after that.