A/N: Couples include: MakoHaru, Regisa, Rintori, and Somotarou.

Disclaimer: I don't own Free! or its characters.

Prologue

"What?!"

"L-look away, senpai!"

"What's going on?"

"H-haru!"

"Rei-chan, I have boobs!"

"D-don't just say it like t-that!"

"What's this...?"

"Why is this happening to me?!"

"L-let's just calm down and figure this out!"

Earlier

"Haru..." a familiar olive-eyed Makoto Tachibana stopped by his best friend/secret boyfriend's house. Then, he looked up and saw why Haru wasn't responding, sighing. "Not this again."

Makoto opened the unlocked front door, and walked into the house. He came into the bath, expecting to see a swimsuit-clothed Haru in the bath. Haru was in the bath, but he was not clothed in anything.

"Gah!" Makoto exclaimed, immediately covering his eyes up with a red on his cheeks. "Haru-chan, warn me next time when you're naked!"

"Drop the -chan, Makoto," Haruka Nanase deadpanned at the gentle giant. "Besides, it's not anything you haven't seen, especially more recently..."

"Still, give me a little warning!" Makoto huffed, feeling his way out of the bath.

"Where are you going? You can join me."

"H-haru!"

A while later, Haru came down fully clothed with his athletic bag into a living room with Makoto. He paused before heading into the kitchen to make his meal.

"Hold on! We have to meet the others so Rin can show this special place he talked about!"

"Mackerel to go."

"Always with the mackerel..." Makoto sighed, looking away.

"Hey..."

Makoto turned his head and his lips met Haru's. Stunned by this display, Makoto stood still while Haru pulled away the next second, with a smile on his lips.

"You worry too much."

Makoto blinked before looking away with a blush. "Just hurry up and eat."

Haru smirked before he turned back to the mackerel preparation.

~Transition/Line~

"What took you guys so long?" Nagisa whined, pouting when he saw Haru and Makoto walking up.

"Haru was soaking," Makoto explained, noticing the Samezuka guys.

"Not a surprise," Rin sighed, cracking his neck.

"Is it a normal thing for Nanase-senpai?" Ai questioned curiously.

"Sounds like it," Sousuke commented, placing his head behind his head.

"What's wrong with soaking?" Momotarou asked, causing the other Samezuka students to look at him funny. "What?!"

"Nothing, let's just go," Rin sighed, leading the way.

The eight swimmers got on the train, only one knowing where they were going. When they arrived, they encountered a vector selling some kind of treat. Naturally, Nagisa wanted to try it, dragging Rei into it. When that failed, Nagisa forced both Haru and Ai to the stand, Momo following them. Rei and Makoto shook their heads at Nagisa's antics while Rin face-palmed and Sousuke looked on confused.

The vector smiled as the four approached the stand. "How many treats would you like?"

"Four, please," Nagisa replied, beaming.

The vector handed them the requested treats. "It's a free sample, really. No charge at all."

"Really? Awesome," Nagisa giggled, taking a bit into the treat. "Oh, it's delicious!"

Haru examined the weird treat. It was pink and shaped like a water drop. The scent of it smelled normal and not dangerous so he placed it in his mouth. It wasn't too sweet to the point of passing out or getting a cavity. Ai and Momo seemed to have eaten the treat no problem, in Haru's eyes.

"Oi, let's go!" Rin yelled at the group.

"Yes, Rin-senpai!" Ai shouted back, hustling back with Momo on his tall.

"Aw…you're no fun, Rin-chan~" Nagisa whined, pouting like a small child.

Haru walked back, nonchalantly, and the group continued on their way to Rin's secret destination. It was a hiking trail, north of the town they had arrived in. Within five minutes, the complaining had started among the group.

"Rin-chan, can we take a break? We're been walking forever~"

"Nagisa-kun, it's only been five minutes…"

"Rei-chan, it's been too long~"

"This is too much effort…"

"Haru, I'm sure Rin is leading us to a special place."

"Still too much effort…"

"My feet hurt~! Ai-senpai, Yamazaki-senpai, carry me~!"

"Momo-kun, be patient! How much further, Rin-senpai?"

"Shut up! No more complaining!"

…

"Are we there yet?"

"Dammit, Sousuke!"

~Transition/Line~

After a thirty-minute hike, the eight swimmers came on a small pool of water. The water was translucent and showed the bottom of the small lake. It seemed about the same length and depth as a 25-meter pool. While some of the swimmers gaped in awe, Haru completely stripped and dived into the pool.

"Oi, wait for us," Rin growled, changing into his suit behind a tree.

Soon, the rest of them changed into their suits and jumped into the small pond. They played and splashed each other with the water. Before long, there were some tingling feelings in the bodies of specific boys.

"Hey, anybody getting a tingly feeling?" Momo asked, starting to panic.

"Oi, don't say weird things, Momo," Rin huffed, glaring at him.

"No, I'm feeling it, too, Rin-senpai," Ai whimpered, gripping his senpai's hand.

"Me too," Haru stated, eyes wide slightly.

"Haru…" Makoto muttered, worrying about his best friend's behavior.

"Same! What does it mean?" Nagisa asked, curiously.

Suddenly, there was bubbles in the pool, causing the boys to panic slightly. The wind increased as an orange glow came from within the pool. The glow and bubbles increased in size and speed as the swimmers exclaimed their panicked confusion in unison. Then, an explosion happened that seemed to be silent and non-destructive, calming the wind and water.

The group looked around, and noticed a change in the group: Haru, Nagisa, Ai, and Momo had slimmer bodies, slightly longer hair, curvy hips, and breasts. The once four boys were now girls.

"What?!" Rin was the first one to speak the confusion.

"L-look away, senpai!" Ai quickly covered her new chest.

"What's going on?" Haru blinked in confusion.

"H-haru!" Makoto exclaimed, covering his eyes.

"Rei-chan, I have boobs!" Nagisa seemed to be unfazed by her sex change.

"D-don't just say it like t-that!" Rei turned away with a red face.

"What's this...?" Sousuke blinked, before covering his eyes.

"Why is this happening to me?!" Momo whined, clutching her chest.

"L-let's just calm down and figure this out!" Makoto was the voice of reason, even if his face was turning redder than a tomato.

~Transition/Line~

After the confusion died off, the now girls changed back into their clothes, even if they were a bit big on them. Haru was reluctant, but agreed to do so.

"So, now what?" Nagisa asked, curiously.

"What do you mean, 'now what'?" Rei groaned in frustration, "You are a girl now. This is biologically… scientifically... physically impossible!"

"How did this happen?" Rin asked, looking around the group.

There was a silence before AI spoke up suddenly, "It must have been that treat we tried earlier. It tasted okay, but it's got to be the only logical explanation."

"Yeah, we were the only ones who ate it," Momo hummed, thinking back to the vender.

"Some were forced," Haru commented, looking at Nagisa.

"Hehe, sorry…" Nagisa stated sheepishly.

Apparently, the now girls had higher pitched voices, something the four other boys were not use to.

Sousuke piped, rubbing his chin, "Maybe if we talked to the vender who gave it out, they could give us an explanation that we have now four guys and four girls."

~Transition/Line~

When they got back to the town, they learned the vender had gone home for the day, and wouldn't back until a couple of weeks or so. The eight were now on a train, heading back to Iwatobi.

"What are we supposed to do now?" Ai asked, worried about the circumstances.

"Yeah, Samezuka is going to ask why there is two girls attending an all-boys academy," Rin remarked, rubbing his forehead.

"Not to mention, Nagisa's parents and sisters are going to notice a new girl in the house," Makoto commented, sighing.

"If we told them that they turned into girls, people are going to think we're crazy," Rei moaned, frowning in disappointment.

"So much to figure out," Sousuke uttered, face-palming.

"What are we going to do about clothes?" Nagisa asked, pouting as she pulled on her oversized shirt. "We can't wear this stuff." She sighed, "I'll just have to borrow my sister's clothes."

"I asked Gou to meet us at the station," Rin replied, looking at his phone. He groaned, "She's not going to believe this…"

"Gou-san will waiting for us?" Momo excitedly asked, stars in her eyes. She paused, realizing her situation. "Oh, right. She's straight and I'm a girl now…"

"You were going to still pursue her, Momo?!" Rin growled, glaring at Momo who flinched back.

"Wah~! You're scaring me, Rin-senpai!" Momo cried, hiding behind Sousuke.

Haru looked outside the window, wondering about how this event would affect her relationship with Makoto. When she was a boy…

~Transition/Line~

"What~, Onii-chan? You messaged me kinda…" Gou trailed off when she saw the four girls. "You picked up girls?"

"No, Gou!" Rin replied, exasperatedly.

"Hi, Gou-chan~" Nagisa choose this time to tease Gou by beaming while waving.

"Why is the blonde girl acting like Nagisa?" Gou asked, by shouting, "And it's Kou!"

"How do we explain this?" Makoto muttered, rubbing the back of his neck. "The blonde girl is actually Nagisa, and the other girls are Haru, Nitori-kun, and Momo…"

Gou was silent, examining the girls. Then, she started laughing. "That's ridiculous! Haha, last I remember, Haruka-senpai, Nagisa, and the two others are boys! Hehe…" Then, she looked at the girls before calming down her laughter. "Although, these girls look a lot like them… And Onii-chan did say he was hanging out with Haru and the guys and half of them aren't here…" Finally, Gou's red eyes widened, "OMG, they've turned into girls!"

"Yes, shout it so the world could hear," Sousuke sarcastically mumbled, earning an elbow to the gut by Rin.

Rei stepped forward. "Gou-san, we need to clothe them until we can figure out how to change them back. Can you handle that?"

"I don't know if all my clothes would fit them," Gou hummed, looking the girls up and down. "Maybe Nagisa and Nitori-kun, but not the other two."

"What about Nagisa's sisters?" Makoto suggested, remembering what Nagisa had said earlier. "Surely, they'll have clothes for them…"

Gou clicked her tongue. "Maybe, but how are we going explain them to Nagisa's parents?" She shook her head. "Never mind that, we need to get the basics!"

"The basics?" the group asked in unison.

"Undergarments, of course!" Gou clarified, crossing her arms. "Like bras and panties!" Then, she blushed, realizing she said that at outloud in front of a bunch of guys. "Let's go, girls!"

Gou marched off with the now girls following her.

"Did we just get ditch?" Rei asked, raising an eyebrow.

"I think we did," Makoto replied, smiling sheepishly.

"Let's just follow them," Rin suggested, shutting his eyes. "There's no telling what weirdos are out at the mall…" The other four started to walk after them.

"The mall?" Sousuke asked.

"Isn't that where they're going?" Rin questioned, shrugging his shoulders.

~Transition/Line~

Gou was able to find the appropriate undergarments for each girl. Both Ai and Nagisa were an A cup while Haru and Momo wore a B cup. The next girls, except for Nagisa, blushed at the various garments for girls. Soon, Gou dragged them to a girls clothing store, and bought them more girly outfits.

Haru wore a blue shirt with a piece of mackerel on the front, skinny blue jeans, and ankle length boots. Nagisa wore a pink flowered knee-length dress, short-sleeved jean jacket, and white wedges. Ai wore a gray knee-length dress with white leggings and black calf-length boots. Momo wore a yellow shirt with black skinny jeans and black tennis shoes.

They met with the rest of the group in the food court. Each wore their respective outfits, minus Gou who looked satisfied at the outfits she and Nagisa picked out.

"Are you guys done?" Rin asked, rubbing his eyes.

"Yes," the group stated in unison.

"Alright, let's go," Sosuke instructed, walking off. "Rin's mom was nice enough to lend her house as we explain-."

"Gou-kun!" A familiar voice made the group froze, especially Momo.

The group slowly turned to found Seijuro, Momo's older brother and the former Samezuka's swim captain, approaching the group.

"Oh, Matsuoka and Nitori is here," Seijuro beamed, recognizing the two. "If Nitori is here, then Momotarou is here as well. Where is he?" He looked around, as the group fell silent.

"Nii-chan…" Momo spoke up in her female voice. Her brother looked at her. "Hi." She gave him a smile that spelled trouble for her when she was a boy.

"Momo?! You're a girl?!"

End of Prologue

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