Hi girls and guys, this is a Mature rated fic, it features sexual content. So those who hate lemons, this is not the fic for you! This fic is heavily based on the story with the same title, written by Megan Hart. I was reading the story, and I was amused at how the story would much more be interesting if Erza was on it, so here you are!

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Indecent Experiment

Prologue

Gray watched Jet and Droy fight for Levy's attention in an obvious lack of interest. His chin rested on top of his arms, squinty eyes almost teary as he fought the sleepiness overcoming his senses, he stifled a yawn. Natsu, Lucy and Happy decided to go off in an adventure on their own. They took a request which lasted for three days leaving him without anyone to bicker with. Gray hated to admit it to himself, but he was bored. He wanted them to get back already.

"Gray" a strong feminine voice beckoned his attention. He looked up to stare at the source of the voice, only to be greeted with a request letter on close proximity to his face. "Let's take this request"

Gray grunted in annoyance, and roughly took the letter from her grasp. "What's this request about, Erza?" He asked, looking up at the scarlet haired knight, who was as usual wearing her armor.

"I'm not really sure, they merely specified that only two wizards are needed for this request, a male and a female." She answered, crossing her arms on top of her breasts as she waited for him to read the contents of the paper.

Fiore's Psychological Department was conducting an experiment, and they needed two wizards for this. The experiment will last a week, and it pays an outstanding amount 500,000 Jewels. The ice mage raised his brow at this, it sounded a bit fishy for him. 500,000 Jewels was a huge amount, it was what people usually paid for S class missions.

Erza tapped her foot impatiently, "So?" She asked. "Are you going with me or not?"

Gray sighed as he pushed himself up, "Well, it's just an experiment, how hard could it be?" He declared, smiling at the requip mage.

"Let's go then." She paused, as she shifted her gaze towards the bar. "Mira, we're taking this request! " Erza spun her heel and headed towards the guild's exit.

The white haired demon smiled from the counter, waving her hand at the leaving pair. "Take care, you guys!"

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After half a day of travelling, Erza and Gray had arrived at Fiore's Psychological Department, it was located on the outskirts of Era and Crocus. Gray gawked at the massive compound before him, just beyond the dark blue gates he could make out at least three or four white buildings. The largest rested at the center of the compound, it looked like a huge hall.

Erza pressed what seemed to be a door bell beside the blue gate, after a few seconds a voice came out of the lacrima above the bell. "What brings you here?" a raspy manly voice echoed.

"We're from Fairy Tail, we were sent to fulfill your request" Erza said, leaning he head forward towards the lacrima.

"Please make your way towards the central hall, it is found in the middle of our compound."The raspy voice said. Soon fumbling noises could be heard from the lacrima, and then in a few minutes the gates had finally opened.

Erza and Gray strolled slowly in the magnificent pathway of the Psychological Departments compound. Everywhere they turned their eyes, men and women in white lab coats roamed around the compound, all of them looked lost in their thoughts, and in their conversations. No one even batted their eyelashes to look at the pair, which stood out like a sore thumb.

Erza shifted her gaze, marveling at the majesty of the place. "This place isn't so bad…" she whispered. She liked how the compound was filled with trees, and different kinds of flowers, it looked like a place from a fairy tale.

Gray nodded in agreement, awestruck at the beauty of the place. "Yeah."

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The central hall of the compound turned out to be just as majestic, although there were only a few visible furniture inside the building. A middle-aged woman led them to separate rooms in the building, Erza was led inside a pink colored room, while Gray was led towards the room adjacent to Erza's.

"See you" Gray smiled at her, trying to reassure himself. Somehow he was starting to feel bad about this certain mission.

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"Miss Erza Scarlet! The infamous Titania!" Leina, a young woman in her mid 20's beamed as Erza came into the tiny room where the briefings were being conducted. "Come on in, Marko will be here in a couple of minutes, what can I get you to drink?" She motioned her to sit down.

Erza settled into the uncomfortable, hard-backed chair. "Oh no, I'm fine" she waved both hands.

"Alrighty then" Leina looked up as her partner, Marko came in. "Good to see you Erza, how's it going?" The slightly older man took Erza's hand and gently planted a kiss on top of it. "First, we'd like you to answer a few questions" He grinned toothily at Erza and handed her a pen, and 10 pages worth of questions.

Erza breathed deeply, her patience quickly diminishing by the moment. THIS IS NOT FEW AT ALL. She cursed under her breath, as she felt her hand cramping as she wrote her answers. At the fifth page of the survey, Erza stopped. Her face red, and her brown orbs stared questioningly at the two people in front of her. "Do-Do I rea-Really have to answer these?!" She croaked, the questions were too intimate for her liking.

The two lab coated duo nodded in unison. Earning an unlady like groan answer from the scarlet haired girl.

"By the way Miss Erza, are you and Mr. Fullbuster dating?" Leina asked.

"NO!" Erza answered, a little louder than she had intended.

Meanwhile on the other room

Hair: Blonde, Eyes: Brown. Bra Size? Gray paused at that one. Did he want to be honest and admit that he was a dick and liked huge breasts, like 34DD? Or did he want to pretend that things such as cups didn't matter.

He scribbled 34D, dropping the extra D to keep himself from being a complete perverted douchebag. Height, weight, hobbies. This was turning out to be a survey of his perfect woman – and his sexual preferences. And honestly, Gray couldn't say that he wasn't enjoying this survey.

It took him forty-five minutes to answer all the questions, and by the end of it, his hand had hurt like hell. After waiting for about ten more minutes, he was reunited with Erza.

He stared at her, taken aback by her un-Erza like state. Her entire face was beet red, it was almost the same color of her hair. Then he remembered the questions, he was pretty sure that Erza was a virgin, and she was absolutely clueless , daresay innocent about most of the questions asked in the survey.

Poor Erza. He thought, amused at the vulnerable like side of the great Titania. He stifled a chuckle as he watched her quiet demeanor.

"Now that you guys are done with the questionnaire! We are now ready to start the real experiment!" Leina took two bracelets from her pocket and gave one each to Erza and Gray. "Please use the bracelets before we reach the room!" Leina exclaimed as she led them to another room.

Gray and Erza exchanged glances as they secured the bracelets on their wrists, their hearts beating wildly, anxious on what the experiment was.

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Erza surveyed the room, in one corner was a large bed with a nice comforter and a few fluffy looking pillows. Nothing fancy at all, she shivered a little, though not with chill. Heat tickled her cheeks. Erza, it's just a bed. She thought to herself, scenes from her erotic books surfacing on her mind. She took deep breaths, calming her erratic beating heart. A soft-looking overstuffed sofa was the only other furniture in the room, along with a thick, plush rug and two small end tables with lamps on them.

"Welcome Erza and Gray! You guys will be staying in this room, four hours a night for five consecutive nights, starting tonight!" Leina exclaimed, extending her hands on top of her head dramatically.

"What?!" Erza and Gray shouted in unison, their voices heavily laced with confusion.

Marko and Leina stared at each other, bewildered. "Were you not informed about the nature of this experiment?" Marko asked perplexed.

Erza and Gray shook their head vigorously at this question. Making Marko slide a palm from his forehead to his chin. "… that sly old dog." He cursed. "Leina and I are interested in studying sexual attractions and reactions." Marko cleared his throat, eyeing the participants whose eyes have seemed to triple in their size.

"Is the desire to have sex with someone based something on purely physical, mental, spiritual or a combination?" Leina added as she smiled nonchalantly at Gray.

Gray gulped, and stared at his partner, Erza stared blankly at Leina with her mouth slightly open. "What exactly are you asking as to do?" He asked, dreading the answer that he was going to receive.

"We've set up an increasingly intimate series of encounters in which we'd like you and Erza to engage. This room is provided for you as the space in which to engage these activities. Changes in your body temperature, and moods – feelings and emotions will be recorded by the bracelets on your wrists."

"You—you want us to have sex?!" Erza shouted hoarsely as she pointed her finger accusingly at Leina.

"What we're trying to determine," Leina said, eyes bright and cheeks pink, "is the effect of predetermined qualities or anticipation on sexual attraction and response."

"In other words," Marko said excitedly, "We're going to see how long it takes for you guys to want to fuck each other."

Erza felt her throat constrict and her mouth dry. On Erza's side, Gray was in a no better condition, he thought he was going to faint.

"It really doesn't mean that you guys would end up sleeping with each other, it's up to you whether or not you'll do the deed."

"Of course, if you guys think that you're unable to pursue this request, then we will be asking Fairy Tail to pay us triple the reward that we've agreed upon. I do hope you understand. We have high expectations regarding Fairy Tail wizards."

Erza gulped, as she regained her senses. "I see, fear not. Fairy Tail shall accept this request!" She announced confidently. Marko and Leina sighed in relief at this.

Gray couldn't believe what she'd just said. "ARE YOU SERIOUS?!" He glared at her, cold sweat suddenly covering his palms. She does not realize the implications of this…

"We will not bring shame to our guild!" Erza glared at him, her eyes filled with determination. "I refuse to back down from a challenge!"

Leina clapped happily, "Well, now that it's settled. Here are the rules that you should know. First: Once you've entered this room and the timer has began, you will be unable to leave this room unless you've done the activities specified for four hours. Second: You are forbidden from seeing each, talking or getting into any contact with each other outside this room. Lastly: Those bracelets nullify magic, as long as the experiment is ongoing, you guys will be unable to use magic and to leave this compound."

Erza nodded, noting each and every rule that Leina had just told them.

Gray stared incredulously at the three people beside him, they were all crazy he concluded. He then turned his gaze at Erza, suddenly aware of how shapely her body was, and how pretty she really was.

"Well, then we're off!" Leina and Marco made their way outside, smiling knowingly at Gray. "Good luck on your first night guys!"

The door of the room disappeared and became a white wall. The room became eerily quiet.

Gray watched as Erza approached the only couch inside the room. His eyes then travelled to the lamps beside it. He gulped, at first he didn't really get the purpose of the lamps, the heavy fluorescent lights provided more than ample light from the overhead, but then he got it. Mood lights. At once, this was scarier than he'd thought it would be.

FUCK. He repeated the word over and over in his head.

In a few seconds, in that same wall were the door had disappeared to, words started to appear.

"Hold Hands"

Erza and Gray read in unison.

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So there you go? What do you think? This story will only be 2-3 chapters long. Before I post the rest of the chapters, please let me know your thoughts. Do you find it too indecent? Should I continue or should I just scrap the idea all together? Thanks for reading, and please do leave a review!

Also, if you like Jerza, please do read my rated T story entitled Perhaps Love.

Thanks!