This was an idea I got through a comic by thefatedmeeting (post/94375820571/lucy-complains-about-natsu-and-happy-messing-with). I hope you enjoy. :)

Lucy stood by the door, completely frozen in place as her blood boiled with anger. She was trying her best to comprehend what she was seeing, but her thoughts were clouded with her rage. It wasn't unusual for her to come home to an intruder, but she was really going to kill Natsu and Happy this time.

Natsu was standing in the center of the room making all different kinds of strange poses while wearing a purple striped bra that was no doubt to be hers. Happy was flying around the room in circles singing some dumb song while wearing the matching set of panties on his head- his ears sticking through the holes where the legs are supposed to go. These two dolts had worn her clothes before to make fun of her, but the fact that they just went through the drawer that contained all of her undergarments, the fact that they probably looked at everything in there- she became a ticking bomb that would blow up any second in a flurry of rage.

Natsu turned toward her once he had heard the sound of the door being shut, "Oh! Hey, Luce! How's it going?" he tried to hide his chuckling as he talked, but the laugh was slowly starting to escape from his lips.

Lucy didn't even know what to say to them; she wanted to yell, shout, and scream at the two blockheads, but there were just too many terrible names and words popping into her head, that she just didn't know which ones to use. Instead, to deal with her anger, she stalked over to Natsu, and prepared to slap him across his face, but he quickly grabbed her wrist before she could even reach him.

Lucy started to yell, "Why do you two idiots keep stealing my stuff!?" Natsu tried to reply to her, but she couldn't understand a word he said because of his uncontrollable laughter. "What was that?" she asked in a bitter tone, which made her sound like a crazy serial killer.

Natsu was finally able to stop laughing, and he paused to catch his breath, "We didn't steal anything."

"We're wearing them! See!" Happy indicated to the panties on his head.

Lucy glared at them, and pulled her wrist out of Natsu's grip, "What's the difference!?"

Natsu began to laugh again, "We never took them out of this room! So they are still where they belong!"

"No! They are not! They belong in that drawer!" she pointed at the chest of drawers by her pink bed, "you went through my stuff! And not just any stuff, my underwear! That is private to me and only me!"

"Aww, come on Luce! It was a joke! Oh! And speaking of which… we got a little something for you!" Natsu looked over at Happy, who began to pull something out of his small green pouch.

Lucy became concerned with what was about to come out of there. Personally, she wasn't sure if she wanted to know. She looked down at the blue cat who opened his pouch to reveal a pair of red boxers.

Happy held them up for all to see, "Ta-Da!" Happy and Natsu said in unison while Natsu gestured at it as if it was some sort of wonderful prize she had won.

She started at the boxers, then looked back up to Natsu, "No thank you."

"Come on Luce! Don't you want to play with us?" Natsu held the edges of the undergarment and waved it in front of her face, "It's really fun~!"

Lucy shook her head, "N-no. Really! I'm ok!" she stepped away from Natsu and Happy who were now crowding her, but she backed into the door, leaving her cornered by the two blockheads, unable to escape their childish grins and wide pleading eyes.

"Please~?" they said in unison again.

Lucy couldn't resist the sparkles in their eyes any longer, "F-fine!" she ripped the red briefs out of his hands, "Just let me go get changed." Natsu and Happy moved out of her way so she could slip through, and make it to her bathroom; there was no way she was going to take off her skirt in front of these two.

She entered her small, but comfortable bathroom, and locked the door behind her- she wasn't going to stand for peaking toms especially since they convinced her to put on a pair of men's underwear- used no doubt. She slid off her green mini-skirt, and slipped on the boxers. They were actually quite comfortable to her surprise. They fit nicely around her thighs, and they weren't too tight or too lose. They weren't too different from any other pair of shorts she's worn, but the material of the boxers themselves was very nice, almost like one of her pairs of pajamas.

She unlocked the bathroom door, and crept out to present herself to Natsu and Happy. She had a light blush on her face from embarrassment, but they probably wouldn't notice due to the fact that they are generally oblivious to their surroundings, and the atmosphere. They were both sitting on her bed, patiently waiting for her return. Natsu chuckled once he got a look at her, "Nice! Now do some kind of pose!"

Did he really have to make this more embarrassing? She thought to herself. She was tired of arguing with him, so she just decided to suck it up, and do what he wanted.

After thinking for a minute about what pose she should do, she still couldn't think of anything, so she decided to wing it. She lifted one hand in the air, pointed towards the wall, put the other hand on her hip, and spread her legs apart and bended her knees allowing her to get closer to the floor. Then, for the final touch, she made her eyes as wide as she could, and puckered her lips to make them look like a fish's lips.

Natsu laughed wildly, "What the hell is that Lucy?!" He fell over on his back while holding his muscular abdomen. Happy couldn't help laughing either, plummeting to Lucy's bed, and falling down next to Natsu.

"What?" she started, "You wanted me to do a pose, so I did!"

Natsu lifted himself back to a sitting position, "No! It's perfect; it's just not what I was expecting! I've never seen someone stand like that!" he continued to laugh, "Oh! Wait! Wait! Wait!" Natsu stood up, and got behind her, bent his knees to be at the same height as she was currently at, he leaned over just so he was barely visible behind her, and then he pointed towards the same direction she was pointing at while trying to mimic the same facial expression she had.

Lucy couldn't help but laugh, losing her pose in the process. What was she doing? This was absolutely ridiculous, but wildly entertaining. She wasn't going to lie, this was starting to become really fun.

"Let's do another one!" Lucy giggled loudly. Natsu and Happy nodded eagerly in response.

They continued to do poses for what seemed like hours, but in reality, it was probably around thirty minutes. The last pose they did had to be Lucy's favorite though. She had her legs well spread apart, having one knee straight, and one knee bent, making her lean to her left, while she had one hand on her hip, and one arm out with her hand opened, almost as if she was showing something off. While Natsu had his legs in the same position as Lucy's only he was leaning to her right, and he had his index finger and pinkie finger sticking on both hands, making it look like some surfer peace sign. Happy was floating in the air next to Lucy, with both his hands on his hips, and his legs spread apart. This pose was somewhat similar to the first one, but it was more coordinated, and it reminded her of some pose a team of silly super heroes would do when they introduce themselves to their enemy.

They all laughed for a good few minutes about that one, but once Lucy finally got her laughter in control she strolled into her kitchen, "Man… I'm rather thirsty. How about you guys?" She never knew posing could be so tiring.

"Yeah," Natsu replied as he followed her into the kitchen assuming she was going to give him something. She handed him a cup of ice water, and then she started gulping down her own.

"What about me?" Happy flew into the kitchen breathlessly. He had been flying all over her room the entire time they had been performing this activity, and with his tiny body, he must have been the most worn out of all of them.

"Of course!" she handed him his own glass, which was a bit too big for his small paws, but he seemed to manage.

After a minute of them all catching their breaths, and quenching their thirsts, Natsu let out an evil sounding laugh, and looked at Lucy with a malevolent grin.

"W-what?" she asked nervously, knowing that whatever he was thinking wasn't going to be mature.

"Let's make a bet Lucy!"

"Huh?"

"Let's wear each other's underwear for one day, and we have to hide it from everybody in the guild! First one that is caught wearing the other's underwear is the loser!" the cherry-haired boy eagerly smiled.

She wasn't sure that this was the best idea or the smartest, but it did sound fun to her. She placed her hand on her chin, and looked up at Natsu, "What happens to the loser?"

He crossed his arms; "Hmm…" he looked down at the kitchen floor trying to think of something.

"The winner should get to keep the loser's underwear!" Happy shouted teasingly.

"Eh?!" Lucy shrieked, her cheeks growing a hint of red to them, Stupid cat!

Natsu maliciously smiled at Lucy, "That sounds like a great idea!"

"Aye!" Happy laughed.

It appeared that Lucy had no say in the matter for she knew that there was no way these two nitwits were going to change their mind. Now she had to win no matter what for there was no way on Earthland she was going to let Natsu keep her bra and panties as a prize to show everybody in the guild. Plus, she wasn't going to deny that his boxers were rather comfortable; she wouldn't mind keeping them to sleep in.

"F-fine!" she pouted.

Natsu clenched his fist zealously, "Alright, so you'll wear my boxers, and I'll wear your bra! Our battle starts-"

"Whoa! Hold on a second!" Lucy interrupted, "You have to wear my panties too!"

He grew flustered, "W-why?!"

She pointed her finger at him, "Because the bet is that we have to wear each other's underwear for one whole day, and my bra and panties are my underwear. You have to wear all of it!"

Natsu growled, "W-well..." he desperately was trying to say something against her statement, but he really couldn't get out of this one. Then, a lightbulb hit him, "Well, I don't wear bras, only boxers, so you can't wear a bra!" he pointed his finger right back at her.

She shrugged, "Fair enough."

"And you have to wear a skirt!" he yelled.

"What!? Why!?" she shouted back.

Happy intervened in their spout, "Because Lucy, it's going to be really hard for Natsu to wear something so tiny down there. You can easily hide the boxers behind pants, so you need something that will give you a challenge."

Lucy knew she was getting into something really stupid, but at this point, she really just wanted to beat Natsu, "Fine!" she held out her hand, "Let's shake on it. You have to wear my panties and bra, and I have to wear your boxers (with no bra) for one day without anyone finding out! Winer gets to keep the loser's underwear!"

He slapped his hand into hers, "You're going down!"

"We'll see about that!"

Lucy now regretted buying every skirt that she owns because they are all miniskirts; none of them reach down to her knees. Even the longest skirt that she owned still didn't cover the red boxers completely, and every time she rolled them up, they would just fall back down as she walked. She grabbed some pins she luckily had with her, and rolled up the boxers as much as she could, then pinned them in place, hoping that it help keep them in place. But, she ran into another problem: bending over. Every time she bent over, the boxers were visible from her rear end. There was nothing she could do to fix that other than hope that after all these years of wearing miniskirts, her practice of hiding her panties when she bent over will pay off. She sighed, and headed for the door, preparing herself to face the outside world with this new challenge.

She was able to walk down the streets of Magnolia successfully, and now, she faced the guild hall doors. She knew that hiding her little secret will be about ten times harder in the guild than it was on the streets due to how boisterous it was, but she walked through the doors with as much confidence as she could muster.

She immediately avoided stopping and getting caught up in the activities of the guild members, and headed towards the back were the bar counter was. She sat down carefully on one of the stools, and she made sure to sit on as much of the back of the skirt as possible.

"Hi Mira!" she greeted her friend casually.

She smiled at her as she sliced up a piece of cake, and placed the pieces on several different decorated plates, "Hello Lucy, and how are you this morning?"

"I'm doing fine. Um…" she looked around the room, her pinked-haired competitor and his blue cat were nowhere in sight, "Where's Natsu and Happy?"

She shrugged, "Sorry, I don't know. I haven't seen them since yesterday."

Lucy set her elbow on the counter, then rested her head on her hand, "Ah, I see…" Are they skipping out on me!? She thought angrily, but then Mirajane pointed towards the door.

She giggled, "Speak of the devils."

Lucy turned to see Natsu standing at the doorway with a nervous smile stretched across his face, and sweat pouring out of every pore of his body. He looked like he was struggling to even move an inch.

"Come on Natsu! Don't you know how to use your legs?" Happy teased.

"S-shut up!" he shouted, "Why don't you just go talk to Carla or something!?"

"I would like to, but watching this is so much fun!" the blue cat snickered as he flew over Natsu's head.

This was absolute torture for him; his shirt was puffed up due to Lucy's bra, and he felt like his lower half was going to burst- it was like trying to shove Elfman into a birdcage. He could feel the discomfort with every step he took.

Natsu started getting some odd looks from Macao, Wakaba, and Romeo. Oh great… the guild members were already noticing that there was something off about him.

"Are you ok, Natsu-nii?" Romeo asked while raising a brow.

"I-I-I'm f-fine!" he snapped. He took a deep breath, and walked as quickly as he could to the nearest table, which happened to be the table those three were sitting at. He sighed with relief once he sat down, and he hoped that he wouldn't have to stand again.

"Are you sore or something?" asked Wakaba without removing the cigar in his mouth, "and… what's that?" he pointed to Natsu's chest.

He quickly leaned up against the table, and crossed his arms and set them on the table to hide all that he could, "N-nothing!"

"That doesn't look like nothing to me," Macao started, "are you sure that you're ok?"

Well, this was a bad start to Natsu's day. Before he could respond, Happy began to speak, "You see, Natsu has a little… or should I say big problem." Happy covered his mouth, trying to make sure his laugh wouldn't escape from his lips, making his cheeks puff up. Natsu needed to come up with a good lie and quick.

"What's wrong Natsu-nii?" Romeo said concerningly.

"I slipped!" the flame-head shouted.

"What?" Wakaba responded for all three of them.

"The other day… I was walking home and I… I fell! And I accidently did the splits! So, yeah, I'm pretty damn sore!"

All of their faces turned white, only being able to imagine the pain of having one's testicles slightly spilt apart, especially if one was not very flexible to start with.

None of them knew really how to help him with his problem. All Romeo was able to choke out was, "I'm sorry to hear that… I hope you feel better!"

"You should really watch your step!" Macao lectured since that was the only thing he knew that he was somewhat good at.

"Oh my," Mirajane started, "Natsu doesn't look well. It looks like those three are helping him though." All Lucy and Mira could see was Macao patting Natsu on the back, and Wakaba and Romeo trying to make sympathetic expressions, but they looked more painful than anything.

What did he tell them…? The blonde asked herself.

"Maybe you should go over there and check on him."

Lucy smiled wickedly. This was her chance to show him how much of a winner she was, "Yeah, good idea!" she carefully slipped off the stool, making sure her skirt wouldn't reveal her secret. Then, she walked across the room at a decent pace that would look normal, but nothing too fast to make the back of her skirt flip up.

She took a seat next to Romeo, "Hey Natsu! How are you doing? You look like you're in a little bit of pain, are you doing okay?" she mocked with a large smile across her face. She just loved the tormented look he had because he totally deserved this for starting this whole mess in the first place.

Natsu smiled back at her, sitting up just from his leaning position just slightly, "Oh, I'm fine. Just a bit sore if you catch my drift."

"Oh~ I can imagine."

"How about you? That skirt must be really uncomfortable. And, I can imagine how much you are bouncing today, it must be annoying."

Lucy's smirk quickly turned into a scowl, and she crossed her arms over her chest. She glared at him, only to get a grin out of him. Wakaba, Macao, and Romeo started giving them stranger looks than before. There was no she was going to lose her cool, or this bet!

"Well, you should know because I bet you're not bouncing at all!" she yelled.

Natsu growled knowing exactly what she was indicating to. They glared at each other fiercely from across the table, "Well, you must be-"

"Whoa, whoa, whoa! What's gotten into you two?" Macao shouted, trying to get in the middle of their glaring to get them to stop.

"Just some friendly rivalry, you could say!" Happy explained.

"Rivalry?" Romeo questioned.

Lucy shook her head, "Oh, it's nothing. Don't worry about it." She stood up laboriously, and as she began to walk away, she winked and stuck her tongue out at Natsu, smiling evilly. She sat back down at another table next to her dear friend Levy, who she began to have a pleasant conversation with.

Natsu snarled. If kept acting like he is now, then everybody in the guild will eventually know that something was wrong with him. There was no way he was going to lose! He decided to stand up as well, and began to walk across the room how he normally would. He was screaming with discomfort on the inside, but he appeared fine to everyone else.

"Gray!" he barked, "Fight me!"

"Huh?" the ice mage turned from where he was standing.

Natsu shot Gray a glare as he pointed at him trenchantly, "I'm in a bad mood, so fight me you naked fucknut!"

"The hell did you just call me!?" There was no backing out of this fight now; they would always fight over the dumbest reasons or for no reason at all, but they would always end up fighting if the other said something to make fun of them in any sort of way.

Natsu slammed his head into Gray's, "You heard me! I called you a naked fucknut!"

"Oh! You're asking for it now!" Gray and Natsu jumped away from each other, preparing to fight.

Gray ripped off his coat and shirt, throwing them at Juvia who gladly held them for him, "Go get him, Gray-sama!" she fawned.

Lucy sighed, What the hell does he think he's doing? What will this accomplish?

Levy sighed with her blonde friend, "They're at it again, huh?"

Natsu beckoned him with his hands with a large grin across his face. Gray got into the proper ice-making stance, and Natsu balled his fists which instantly bursted into flames. Before Gray could make a move, Natsu began to move to punch him, but then he suddenly came to a halt.

His original goal was to beat the stupid ice mage to show everybody that there was nothing wrong with him, but his attempt obviously ending in disaster for him. He was used to taking large steps when he went to punch someone, but taking large steps was something that he lost the ability to do. He grunted due to the unpleasantness in his pants. Gray's eye twitched as his jaw dropped. He didn't really know what to say in the matter, so he just stood there watching flame-head suffer.

"Well, that wasn't very manly!" Elfman shouted passionately from across the room.

"What the hell does he think he's doing?" Macao said with annoyance, "He really shouldn't put himself in these situations when… he has that kind of problem."

"Uh…" Gray started, "Are you okay…?" Normally, Gray wouldn't really care about Natsu's condition if they were fighting, but Gray didn't even hit him yet.

"I'm fine…" he said, but not very convincingly. His whole body was slightly shaking; that last step that he took was a huge mistake because his discomfort transformed into pain.

The ice mage got closer to him, attempting to figure out what was wrong with his cherry-haired rival, "Are you sick or something?"

"Uh… no…" Natsu had completely forgotten the lie that he had told Wakaba, Macao, and Romeo. He sweated a little, "I-I…" he leaned a bit closer to Gray and whispered, "Lucy got angry at me… and she kicked me there…" he pointed downwards.

Gray made a painful face, "Ouch… sorry about that…" he felt a little cheated; Lucy got to beat Natsu up more than he did today. "I guess she can be as scary as Erza sometimes!" he joked. The conversation went silent as Natsu tried to fix his positioning; neither one of them knew what to say, so Gray turned and began to walk away, "So, I guess this means I win!" a smirk grew across his face.

"WHAT!?" he screamed. There was no way in hell that Natsu was going to let this be the day that this stupid ice jerk beat him. Outraged, he moved forward, completely oblivious to his aching and he grabbed hold of Gray's pants and ripped them right off.

This made Gray fall backwards and land on his rear end. He grew flustered with embarrassment, "What's your problem asshole!?" Even though he was completely used to being in the nude, he was normally the one stripping, not someone else snatching clothes from behind him.

Natsu swung the pants around in a circle over his head, "This is what you get for being a pervert!"

"You're the one who ripped them off me! Plus, what does my clothes have anything to do with this fight!?" he jumped back up on his feet.

The two continued to yell at each other as Lucy shook her head at them, "Man, what an idiot." She said under her breath.

"Hey, Lu-Chan?" Levy began, "What's been up with you and Natsu? I heard your little argument earlier. Did you guys… do something…?"

Lucy turned to her friend, raising a brow, "What do you mean?" Then, Levy's question sunk in, making her face completely red, "N-n-no! We d-didn't d-do a-anything like that! I s-swear!" she shook her head vigorously and waved her hands in the same motion.

"Then, what have you two been up to?"

Lucy couldn't answer that because she knew that Levy would figure out about the underwear exchange if she gave her the smallest hint, "W-would you look at the time? I promised I would go help Mira today. S-sorry! I got to go!" she stood up from the table. She was sweating like a sinner in church. As she started to walk away, part of her skirt got hooked on a lose nail on the edge of the table, and it begun to rip.

Across the room, Natsu noticed that Lucy was just about to be revealed to the whole guild. He smiled wickedly as he turned away from his screaming match with Gray. He started to point at her, but then Gray grabbed a hold of his belt, and started to pull on it, forcing Natsu's pants to start to fall.

Lucy saw Natsu's situation and she turned her body to point at him, but this made her skirt completely rip off, and at the same time, Natsu's pants fell down. They both shouted, "YOU LOSE!"

The whole guild went silent at the sight they saw; Lucy was wearing a pair of red boxers, and Natsu was wearing a pair of purple stripped panties. Everybody's jaws dropped and their eyes widened. The belt slipped through Gray's hand and it landed on the floor. Lucy and Natsu were both frozen in place with embarrassment with nervous smiles stretching across their faces.

"L-Lu-Chan…?" Levy's eye was twitching.

"Don't tell me…" Gray pointed at Natsu's chest, "that you're also wearing a bra!?" he yelled.

Natsu's whole body tensed as he slowly looked at the ground. Then, he shot himself back up, "WHY IS IT THAT YOU ARE SO BIG IN SOME PLACES AND SO TINY IN OTHER SPOTS!?" he pointed at Lucy's boobs, then pointed in between her legs.

"HOW AM I SUPPOSED TO KNOW? THAT'S JUST HOW MY BODY GREW! HOW COME YOU'RE BOXERS ARE SO GOD DAMN LONG? JUST HOW MUCH ROOM DO YOU NEED?" she yelled back, her face still completely red.

"So," Happy started, "I guess it is a tie!" he laughed wildly.

The next day was a living hell for both of them. They were both teased all day by every single guild member- Gajeel even made a song called, "Natsu's Panties" which he sung all day. Both Natsu and Lucy sat at the bar all day with their head slammed against the counter. A river of tears flew out of Lucy's eyes, and Natsu's face was just completely blank, emotionless.

Mira giggled as she place a plate of meat in front of Natsu and a piece of cake in front of Lucy, "A bet, huh? So, who is going to give up their underwear?" she asked.

They both lifted their heads, "NO ONE!" they shouted in unison.

Happy, Carla, and Wendy were sitting near them, watching them suffer, "It wouldn't have mattered who won and who lost," Wendy started, "because the whole guild would have known that they were wearing each other's underwear."

Carla nodded in agreement, "Yup, they're idiots. If one was discovered, they would have had to explain to the guild what was going on, revealing both of them."

Happy took the fish out of his mouth to join the conversation, "But at least the winner would have gotten some new underwear!"

This was REALLY fun to write! XD If you couldn't pick it up, I was trying to indicate that Natsu is large down there. ;)

The second part with Gruvia should be out soon (hopefully), I only have a month of school left, so the teachers have been piling on the work, plus I have a ACT to take and an AP test coming up, so that might delay the next part. I apologize for that!