Mizuki- So I said I was going to do a new story, and I was telling the truth, right? ^_^ Anyway, so I'm going through an obsession with mermaids and glee right now haha, so this is how H2O; Just Add Glee was born. Now, it's not really a cross over, so I didn't put it into the crossover category, it's just the whole thing with the mermaids is how the title came to be :)
And this is an AU, kinda sorta, some of things will be the same, some of the stuff that happens in the show will happen, so some spoilers, but some things will not happen, and there will be ooc characters, like Rachel and Quinn.

So some of the things you should be warned about;
Rachel, Quinn, and Kurt became friends over vacation, and are friends when the story starts.

Rachel is probably going to be a bit more ooc then others, well her and Quinn will be.

Blaine goes to McKinley already, he only went to Dalton for a yea,so Wes and David are his friends from the school, and is the same age as Kurt.

And Kurt's crush on Finn never happened :)

Um... anything else? Hm, if so, you'll find out :D Oh, but if they do act too ooc, I'm sorry, this is my first Glee fic..

Disclaimer; I do not own Glee, if I had there would be so many more Klaine moments 3 Anywho, on with the story!

-START CHAPTER 1-

Rachel Berry gasped, feeling the cold liquid down her front, she quickly stood up glaring at the cheerio who had done it, and glanced hurriedly at her blonde friend, who nodded.

"Hey, Marissa," Quinn Fabray called over to the cheerio, and Rachel made her escape to the bathroom.

She locked the door, and nod even a second later, she was on the ground, staring at her tail. She sighed, fell backwards, and groaned.

"Is it just me or does it seem like when we can't just walk to the beach it's harder to avoid water," Rachel complained, walking along side her friend, Kurt Hummel.

Kurt rolled his eyes, "Well, I've managed to avoid it, since there's not too many liquids in dumpsters, thank Gaga for that."

"Still," Rachel frowned, and then paused, "Kurt, you go ahead, I'm going to sign us up for Glee," Rachel grinned.

Kurt raised an eyebrow, "I didn't think anyone would take it over after Mr. Ryerson got fired, which I recall you had something to do with."

The girl stuck her nose in the air, "Yes, well, what he did to poor Hank was terrible."

"More like the fact he didn't you the song was terrible," Kurt scoffed, and smiled.

Rachel grinned at her friend, before writing Kurt's name, an then hers, and putting a gold star on it, and turned around, her eyes widened seeing the slushy come after her, and she ducked out, it went over her head. She stared wide eyed at the now slushy covered floor, and shocked jock. She gave a nervous smile, before heading away.

"Hello, I'm Kurt Hummel, and I'll be singing Mr. Cellophane."

"Hi, my name is Rachel Berry and I'll be singing On My Own from the seminal Broadway classicLes Misérables."

It was over the summer everything happened. Quinn, Kurt, and Rachel had somehow met up in Australia, all surprised to see each other there. They met Quinn's cousin Emma, and figured something weird was going on. They certainly figured out what it was, and because of it, every ten seconds after they touch water they sprout a tail.

"Very nice Rachel."

"When do rehearsals start?"

"Sit down you're rocking the boat!"

"We suck," Rachel sighed, letting her hands drop down.

"I-Um, we'll get there, we just need to keep rehearsing," Mr. Shuester offered.

"Mr. Shuester, do you have any idea how ridiculous it is to give the lead solo in Sit Down You're rocking the Boat to a boy in a wheel chair?"

"I-Uh..."

"Mr Shuesters using the irony to enhance the performance," Artie spoke up.

"There is nothing ironic about show choir!" Rachel snapped, before turning on her heel, and storming out of the room.

"Rachel- Rachel!" Mr. Shuester called, but sighed when he heard the door slam shut.

Kurt sighed, and walked down the halls, Rachel was being the drama queen she is, but he had to admit she had a bit of point, they weren't good.

He ended up being so wrapped up in his thoughts that he almost didn't notice when he collided with someone, a drink spilling down his front. He glanced up at the boy who had done, he has dark, and gelled down hair. His eyes widened.

"Hey, ar-," Kurt stood up, and ran towards the bathrooms, locked the door, and slip to the floor, seeing his tail, he sighed, and grabbed a towel out of his bag, wishing he had Rachel's power right about now.

Quinn raised an eyebrow, seeing Rachel and Mr. Shuester talking, she looked like sad, she didn't expect to be something too big, or else she'd be in tears, she turned her attention back to the cheerios when Coach Sylvester started to bark orders again.

Quinn plopped on the couch at Kurt's house, "So, what's going on with Rachel?" she questioned, raising an eyebrow.

Kurt sighed, and folded his hands, "Well, she had a fit in Glee since we sort of are terrible, and we were singing Sit Down You're Rocking the Boat to Artie Abrams."

Quinn raised an eyebrow, "You mean the kid in the wheel chair? Isn't that a bit ironic?"

"Exactly."

"I see..."

"Anyway, ya know how the ocean was kind of our place to swim?" Quinn nodded, and Kurt continued, "Well, I found out about some pretty big, and pretty deep salt water lakes around, and I figured if we can find a secluded one, that could be... our place."

A smile bloomed on the girl's face, "That would be amazing Kurt, you are amazing!"

"I am pretty amazing aren't I?"

So, turns out Finn's a good singer, and for the first time they kind of sort of didn't suck, both Rachel and Kurt realized.

Kurt resisted the urge to roll his eyes when Rachel went dancing towards Finn, and messed up his hair. He quickly put it back in place, and couldn't help but think what the hell was she doing? Finn is with Quinn!

"Oh hell to the naw!" Mercedes Jones split Finn and Rachel up, "I am not down with this background singing nonsense! I am Beyonce, I ain't no Kelly Rowland."

"Okay, look Mercedes, it's just one song," Mr. Shuester tried to reason with her.

"And it's the first time we've been kind of good," Kurt interjected.

"Okay," she turned to Finn, "You're good white boy, I'll give you that, but you better bring it," she turned back to Mr. Shuester, "Let's run it again."

"Okay, let's do it!" Mr. Shuester laughed, and clapped, "From the top!"

Kurt, once again groaned, and found himself on the floor, "Ow," he groaned, and sighed, well at least this time no beverage was spilled all over him.

"Hey, sorry, are you alright," he blinked at the hand in front of his face, and eyed in warily.

"What?" he scoffed, "No fairy jokes? Are you going to throw me in the dumpster?" he asked bitterly.

The boy looked taken back, "What? No!"

Kurt frowned, and took the boy's hand, and he was helped up off the floor.

"Blaine Anderson," the boy greeted.

Kurt flashed a smile at the boy, "Kurt Hummel."

The boy smiled back, "You're not going to run off this time are you?"

Kurt bit the inside of cheek, "Er, last time was because I was wearing Marc Jacobs, and didn't want it to stain," he lied.

Blaine shrugged, "That makes sense," he raised an eyebrow, "So you're?" he struggled for the right word.

Kurt rolled his eyes, and nodded, "Yes, I am gay."

Blaine laughed, "Well, at least I'm not the only one in this school."

Kurt's eyes widened, "You're...?"

"Yea, I am, but no one's really found out yet, don't think anyone suspects it since I may have joined the football team."

"Oh, yea, the Neanderthals think if you're gay you have to be a stereotypical gay, which I am, but still."

"You're in Glee right?" Blaine questioned.

"Yea, I am, how did you?"

"I saw your name on the sign up sheet," Blaine cut him off, "I was going to sign up, but then I saw the last person who did had a slushy thrown at him."

"Yea, that happens, a lot actually, but hey, you should join, if your any good that is."

Blaine raised an eyebrow, "Doubting me already?"

"Perhaps."

"You're very talented," Rachel turned to Finn.

Finn smiled sheepishly, "Really?"

"Yea," she nodded, "I would know, I'm very talented too," she paused for a moment, "I think the rest of the team expects us to become an item, you the hot male lead, and me, the stunning young, ingenue everyone roots for."

"Well, I uh- have a girlfriend," Finn said awkwardly.

"Really, who?"

"Quinn Fabray," he answers.

"Cheerleader Quinn Fabray? The president of the Celibacy Club?" My friend Quinn Fabray! She practically screamed in her head,

"For almost four months now. She's cool. Mm, I wonder if they have sour patch kids," he moved forward in the line.

"Hey, guys, so this is supposed to be our competition, but, uh, I honestly don't think that they've got the talent that we've got. But let's be a good audience, all right? Give 'em some of that old McKinley High respect," he encouraged him.

They started, and everyone's eyes widened. They were amazing.

"W-we're doomed," Tina stuttered out.

Both Rachel and Kurt, although they didn't want to, agreed with her.

"You're leaving us? When?" Artie asked, they were all gathered in the auditorium, Mr. Shuester telling them he were leaving.

"Well, I've given my two weeks notice, but I promise I'm going to find you a great replacement before I go."

"Is this cause those Carmel kids were so good? Because we can work harder," Mercedes spoke up.

"This isn't fair Mr. Shuester, we can't do this without," Rachel spoke.

Mr. Shuester sighed.

"So does this mean I don't have to be in the club anymore, or...?" Everyone turned to stare at Finn.

"This isn't about you guys. Being an adult is about having to make difficult choices. It's not like high school. Sometimes you have to give up the things that you love. One day you guys are going to grow up and understand that. I have loved being your teacher."

Kurt sighed, though he wouldn't admit to it, he was a bit disappointed that Mr. Shuester was leaving. He glanced at his phone, just a few more feet to go..., and he came to a clearing with a large lake. There didn't seem to be anyone around, so he edged closer to the water, before diving in.

"Looks guys, these steps are not hard, I've been doing them since I was three."

No one else seemed to agree with her, and even though she is his friend, Kurt was starting to get annoyed with her.

"I'm sorry, did I miss the election for queen? Because I didn't vote for you," Rachel gained a hurt look her face, and Kurt felt guilty, but he couldn't help feeling that it was true.

"I know what I'm talking about, I won my first dance competition when I was three months old," she argued back.

Kurt opened his mouth to reply, but changed what he was going to say when he saw Finn come in, "This a closed rehearsal."

Finn sighed, "Look, I owe you guys an apology. I never should have quit, I don't want to be the guy who drives around throwing eggs at people."

Rachel's shoulders slumped, "That was you?"

Kurt crossed his arms, "You and your friends threw pee balloons at me."

"I know."

"You nailed all my lawn furniture to my roof."

"I wasn't actually there for that, but I'm really sorry. Look, that isn't who I am, and I'm tired of it. This is what I want to be doing, with you guys. I used to think that this was like, the lamest thing on Earth, and maybe it is, but… we're all here for the same reason—'cause we want to be good at something," He turned to Artie, "Artie, you play guitar, right? Think you could recruit the jazz band?"

"I do have a pull there," Artie answered, and pushed his glasses back up.

"All right. Mercedes, we need new costumes, and they have to be cool. Can you do that?"

"Damn, do you see what I got on?"

"Rachel, you do the choreography, Tina what are you good at?"

"I-I-"

Finn cut her off, "We'll find something for you."

Mercedes frowned, "And what are you bring to the table, Justin Timberlake?"

Finn smiled, "I've got the music."

They performed Don't Stop Believing, and Mr. Shuester smiled.

"Good guys, it's a nine, we need a ten. Rachel, you need to hit the ones and the fives. Finn, if we worked on it I think you could hit a high B."

"So does this mean you're staying?" Finn grinned.

"It would kill me to see you win nationals without me. From the top!"

"So this it?" Rachel breathed, "Not as great as the ocean, but until summer comes along again, I guess it'll do."

Quinn nodded, "It's pretty big, and not too many people are around."

Kurt smiled at them, "So, want to test the waters?"

They looked at each other and nodded. The three grabbed each others hands and dived into the water.

-END CHAPTER 1-

Mizuki- Jeez, one chapter was 2118 words, which actually isn't surprising, since even though I haven't been on here, I have been writing still ;) And improving.
Anyway, you should totally comment, it'd make me happy :D