A/N: This chapter is the reason this story is rated M. Renamon will display nudity there. So please enjoy.
Chapter 14: The Flashback
Guilmon began explaining what had happened three years ago, to which a beautiful spring with a waterfall in an unknown part of the Digital World came to his mind.
"It was two years and nine months ago that I was separated from the others. And I walked on my own, very lonely. I missed everyone, especially you, Takato, because... well... I was still just a child back then. Then I came upon this unknown water in the unknown place in the Digital World." Guilmon told the Tamers, new and old, while remembering as a younger Guilmon appeared from the forest and fell to his hands and knees, in tears from being alone.
"Takatomon, why am I missing you so much? And I am so hungry and thirsty. I wish there was peanut butter and Guilmon Bread around here." Guilmon said sadly, before crawling over to the water and saw his reflection in the water.
It look so peaceful and calm.
He saw his face and wiped away his tears.
"Guilmon never seen this spring before. Me see reflection and everything. I look pathetic. Takatomon would laugh at me if he saw Guilmon cry. Well Guilmon thirsty so it wouldn't do anyone harm if Guilmon drinks from this." He thought aloud, lowering his arms into the water, cupping his claws together, filling them up and then brought them up to his mouth and drank the water, finding it nice, cool and refreshing, before he helped himself to two more claw fulls.
And after sating his thirst, Guilmon stood up and began to leave.
"I decided to return to the others afterwards. But on my way there, something happened. My vision became blurry and my body began to feel heavy. It felt like my body was changing." Guilmon then said, remembering his past self stop and the effects on his body
"What? Everything is becoming blurry... funny looking... My body... why is...?" Guilmon past form began to say as he slowly came close to a breaking point.
"Soon, I lost consciousness and fell." Guilmon said as his younger self fell down and laid motionless, still sweating.
"It was about four hours until I woke up again, but when I did, I was in for a shock." Guilmon continued, remembering how he slowly opened his eyes, taking in his surroundings, before asking himself. "Uuuurrggghhhh... Wh... what happened to me? I remember I was drinking some water and then, just outside, I collapsed. Just what is...?"
Guilmon then stopped as he noticed the change in his voice and he also saw his paws were much muscular than before, making Guilmon look all over his body and found it to have changed greatly, to which his body was more muscular, his chest got bigger and muscular, but Guilmon also gained a six pack stomach, while his legs increased in muscle too.
With such changes, Guilmon leapt up with surprise, looking all over his body, he cried out. "My body! What happened to my body? I feel taller and my stomach, it's flat. And where did I get this amazing strength? This incredible power... Am I... am I an adult now?"
"And..." Guilmon then started to say as he looked down at his crotch and blushed. "And... and... uuuuhhh..."
"Now I've got private areas too?" Guilmon asked himself, before breaking a branch off a tree and covering his privates with them, making him say. "That's better."
But wondering how he changed, Guilmon thought. 'Not only that but I feel more mature… more smarter... more adult. Trouble was, when did this happen? Did that water have something to do with this?'
With that thought, Guilmon rushed back to the spring and begin to search for answers or clues, before he came across a sign post and he carefully read it.
'The Digi Morph Spring! This spring will bring changes to any Digimon who drinks, bathe or swim in it's waters. If a Digimon should interact with with the spring, they will gain a more human-like body that is completely mature like an adult human. They will retain their data, but also become a more real being of flesh, blood and other features of a human. In other words, anyone who drinks, swim or bathes in this water will have their bodies changed to their expressed gender. There is no way to reverse this effect and it is permeant. So all Digimon who wish to desire as what they are... KEEP OUT!'
After reading it and feeling like a fool, Guilmon sat on a rock, legs and arms crossed and had a fed up look on his face.
"Great. So that is the Digi Morph Spring and I drank it! So now I'm stuck like this! I can't show myself in front of the others they be shocked to death. No other choice then. I have to stay away from the others, including Takato." Guilmon thought.
"So you drank from the Digi-Morph Spring and gained a new body eh? Too embarrassed to show yourself in front of the others?" A male voice asked, making Guilmon turn around to see Dojomon standing there.
"I am Dojomon. I am from the village no one knew existed." He said, introducing himself, before he offered. "Come with me, and I will help you get used to your new body and turn you into a powerful fighter, young cricket."
Not wanting to be impolite, Guilmon rose up and bowed in gratitude to him.
"Dojomon-sensei took me back to the Hidden Digimon Village where I decided to get used to my new body through training, physically and mentally. I felt I had to if I hope to gain the courage to face the others again." Guilmon said as more flashbacks entered his mind, including him meditating under a waterfall, breaking rocks and wood, getting smarter by reading books and learning to eat properly, both in the sense of a balanced diet and using utensils over his hands.
"I trained for an entire year. I was in sync with my body. And a month later, I decided to return to the Digi-Morph Spring for more study." Guilmon told his allies, thinking to how he headed back through the forest, wearing a white karate gi and thinking to himself with pride. 'I'm starting to get the better of this now. Still... I wonder how the others are doing? Even though I am a little afraid of what happen when they saw me like..."
But Guilmon then stopped as he picked up a familiar scent and hid behind the biggest tree, poking his head to see a familiar foxy Digimon, who was covered in mud and looking in the sky just outside the spring.
'Renamon? What's she doing here?' Guilmon thought.
"And that's when I came in the picture." Renamon spoke up as she began to tell the Tamers and Digimon their tale.
"When we returned to the Digital World, I had a rough time. Cyberdramon cheated on me, Impmon was with my sister, BlackRenamon and I was alone, something I didn't mind. But then Terriermon requested that I search for Guilmon, who was missing for year years. I didn't want to at first, but I thought I had nothing better to do, so I accepted."
"Damn you, Cyberdramon." The past Renamon said to herself, expressing a variety of emotions as she then said. "I cannot believe you cheated on me. And I've hooked Impmon with BlackRenamon so I can be finally be alone. But then Terriermon asked me to look for Guilmon. And guess what... I COULDN'T FIND HIM ANYWAY! How the heck did he disappear so easily? I could've at least picked up his scent. I cannot give up now. I promised Terriermon and Calumon that I'd find him."
But breaking from her thoughts, Renamon then looked all over her body and found herself dirty, causing her to say. "I cannot search for him like this. I don't know where this spring comes from but it'll do."
With that, she took off her gloves and tipped her feet into the Digi-Morph Spring.
Hearing and seeing Renamon about to clean herself off in the Digi-Morph Spring caused a shocked look to appear on Guilmon's face, making him then think. 'SHE'S GONNA WHAT IN THE DIGI-MORPH SPRING!?"
Renamon then hopped into the spring and dove into the water, washing the mud off.
"There... now all the mud is off, I guess I..." Renamon began to say before her vision became blurry and her body started to feel heavy, causing her to stagger on the spring floor.
"Wha... what is happening...? Everything's so blurry...? My body..." Renamon managed to say, feeling lightheaded.
'The same thing happened to me too. I have no choice.' Guilmon thought as he leapt from the tree and ran into the lake, where he caught Renamon as she fell.
"Renamon! Renamon, hang in there!" Guilmon called out, causing Renamon to look up at him, her vision still blurry as she asked. "Who is... Guilmon...?"
But then she fell unconscious, concerning Guilmon a little as he dragged her out of the lake, dried her off and laid her unconscious form beside him.
And as he sat next to her, he felt some guilt.
"I could've prevented her from going through the same fate as me, but she swam in it. I just drank it. It wonder if it was different then..." Guilmon said to himself, but then he stopped and looked at Renamon.
He now noticed that Renamon now had a huge and curvy female bottom.
"A human-like butt! She has a butt like I do, but hers' is bigger." Guilmon gasped as he grabbed Renamon's body and laid her on his lap. "I guess it makes no difference if it was swimming or drinking! She's transforming too!"
And seeing more changes, Guilmon then noticed Renamon's mane shaking a bit before two things came poking out of her mane and grew bigger and bigger and bigger, a set of breasts, as well as gaining pink nipples on each of them, which grew to an impressive E-cup, while a belly button appeared on her stomach.
"So this is what happened?" Guilmon asked as he put a claw on Renamon's breast, moving it around a little and causing Renamon to moan softly, while Guilmon was surprised, for he couldn't believe they were so huge.
"She does look beautiful and sexy..." Guilmon admitted, only to blush at what he said and ask. "Did I say that?"
Continuing to examine Renamon, Guilmon then looked at her face and saw she now had eyelashes, before he got curious.
He had to know if Renamon was completely a woman, to which he lowered her down, held her legs and said in apology and in no disrespect. "Sorry Renamon, but I have to know."
With that, Guilmon then spread Renamon's legs open and his suspicions was correct, for the red dino Digimon saw Renamon's vagina.
"Yep, she's a girl. Only girls have 'love tunnels'." Guilmon said as put her legs down and decided to give her back her privacy. "I better stay by her side until she wakes up and then I'll tell the story."
Waiting for Renamon to wake up, Guilmon stood beside her until he heard Renamon moan, causing Guilmon to turn around and saw Renamon slowly coming to.
"W...what happened to me?" Renamon asked as she rose up, while placing a paw to her forehead.
"Renamon, you're awake!" Guilmon said, causing Renamon to snap to her senses, look at Guilmon and was shocked at seeing his new appearance.
Breaking from her stupor, Renamon asked. "Guilmon, is that really you? What happened to you?"
"I'm not the only one who changed. Look at yourself" Guilmon replied, which confused Renamon until she noticed her chest felt a lot heavier, making her look down and saw her huge boobs and belly button, causing a shocked expression to appear on her face.
And the shock increased when she looked behind her and saw her bottom, as well as her vagina.
At this, Renamon freaked out, covering her crotch with one hand and another on one of her boobs.
"This is impossible! Digimon don't have sexes! I know this to be true. I told Rika's mother! Now I have female sex! What is happening to us?" Renamon cried out, which caught Guilmon by surprise at Renamon, of all the Digimon he knew to be freaking out.
'Not what I was expecting from her at all!' He thought.
"Renamon, calm down! I know exactly what happened because it happened to me too, but I need you to calm down and relax!" Guilmon then said, placing his hands on the vixen's shoulders, who felt calmed a little by Guilmon's touch and his words, causing Renamon to nod, take a few breaths and say in reply. "You're right. Ok, I've calmed down now. I am impressed with you, Guilmon. You're more grown up than the last time I saw you."
"I'm surprised you knew it was me." Guilmon said in reply, before saying. "Anyway, come with me and I'll show you what has happened to you."
-A while later-
Doing as Guilmon had told her, Renamon had followed Guilmon and was now sitting with her hands around her knees and feeling quite stupid after reading the sign.
"I cannot believe I failed to notice that sign. Now I'm stuck like this like you." She said with a sigh.
"I know. That is the main reason why I went into hiding." Guilmon replied as he then stood up and said. "Good of you to find me, Renamon, but I must return to the village. You have to go back and tell the others."
"I can't. I'm too embarrassed to show myself like this. I'm worried what they thought if they saw me like this, even my sister." Renamon admitted, before an idea popped in her head, causing the foxy Digimon to smile and say."So is it alright if I stayed with you in the village you are staying at? Best we hid together then show ourselves."
"Yeah, why not?" Guilmon smiled, being his usual kind and considerate self. "No matter how to look at it, we're stuck together like this."
After hearing how the pair had arrived in the village together, Takato had a question on his mind.
"Ok, so we now know why you two hid from us and how your bodies change but how did you fall in love?" He asked, causing Guilmon to start and explain. "That was a year later. We were still living in the village..."
Renamon, now wearing the clothes she was now dressed in, blushed over a gossiping BlackGatomon and Ranamon.
"Some Digimon begin to mistake us as a couple because we were so close to each other now then we were in the past. And there where even those who thought we should be a couple." Guilmon said, remembering a similar situation, to which he was dressed up and blushing as well at what a Gaomon was saying to Dojomon.
"Though we denied it at first because of our past, first being enemies, how we acted towards each other, but for some reason, both of us noticed the changes in each other and are unsure about this. Until that night..." Guilmon continued, his memory turning to a night where he was leaning against a tree and said as he thought about Renamon in the past. "How can they say me? Us? In the past, she was cruel, she only cares about fighting. She tried to delete and me and take my Data for herself, not to mention she has a habit of trying to beat me up."
As the past Guilmon rambled, past Renamon was leaning against a tree and was thinking about Guilmon.
"He is supposed to be a child, a goofball, idiotic, too young to know anything about love apart from bread and peanut butter. And how can I compete myself with someone who I cannot defeat myself!" Renamon thought aloud, only to go silent and thought of the new Guilmon and how he had changed.
"But now when I saw him with that new transformed body of his, he's more mature, more grown up. He no longer acts like a kid. He is now powerful, sensible and was even kind enough to introduce me to everyone despite all the things I've done to him in the past, not to mention he is quite handsome. So maybe I..."
"Her body, her attitude..." Guilmon said to himself. "It changed her, like it changed me. She's a kinder person now. Loving and more open to everyone. And not to mention she has grown very beautiful. So maybe I..."
"And he/she is right behind me isn't he/she?" They both asked, blushing a deep shade of red as they realised they were pressed against the same tree.
And after facing each other, Guilmon, scratching the back of his head, decided to speak first. "I guess we need to talk now."
"Yeah. I guess so." Renamon replied and nodded.
"You really think I've grown and think I'm handsome?" Guilmon asked.
"Y... yes I did say that." Renamon admitted, but had to ask. "And you really think I am more kinder now and beautiful?"
"Yeah." Guilmon replied with a blush, before he said. "So I guess what the others said are..."
However, Guilmon was then cut off when Renamon put her paws on the sides of his face and then pressed her lips against Guilmon, surprising Guilmon by the sudden actions of Renamon, as well as the warm feeling from her kiss, causing him to then close his eyes and return the kiss, as well as wrap his arms around her waist, holding her close to him.
And after a while of kissing, they broke from their lips, looked in each other eyes and smiled.
"I love you, Guilmon." Renamon said to Guilmon, making him smile and say in reply. "And I love you, too, Renamon."
With their feelings confessed, both then embraced each other under the beautiful night sky.
"And before long we fell completely in love with each other. And it was only two months later we were married." Renamon told Rika and the others, displaying her ring, while thinking of her wedding, remembering the church bells ringing over the village, Guilmon in a white suit and herself in a beautiful wedding dress with a veil over her head, while holding a bouquet of flowers.
"While on our honeymoon, we mated the same ways as the humans do." Renamon said, her thoughts turning erotic, for in a hotel room were Guilmon and Renamon, both Digimon were naked, gazing romantically in each other's eyes and sweating from their love making.
"And then I was pregnant carrying twins." Renamon then said, thinking to herself, pregnant and naked in a bath, while Guilmon was by her side, smiling and washing her.
"So many months later, I looked after Renamon until she was ready to give birth. And five months later, Renamon laid the Digi-Eggs." Guilmon said as he continued the story, remembering the day Renamon had given birth and was in a hospital bed, holding a red Digi-Egg, while Guilmon was carrying the yellow Digi-Egg, with both Digimon smiling at each other, followed as both shared the memory of the Digi-Eggs hatching and their children coming into the Digital World, reaching their Rookie forms, Genamon and Ruilmon.
"And that is how Genamon and Ruilmon were born." Guilmon said, ending the story of their new lives, their love and their family.
A/N: I done the comic version to this flashback on stash. So if you wanna see, let me know.