Disclaimer: I do not own anything related which includes the characters of Fairy Tail.

Rated M for future lemons! You have been warned!

Chapter 1: Natsu Goes Back in Time

Natsu was in pain. His entire body hurt so bad if it wasn't for his will to fight, he would have been already dead. However, it wasn't the time to think about such things. He had to get back up. Everyone in his guild, his family, were depending on him to succeed. He had to win, there was no other option. If he didn't then, they were going to be killed. He couldn't let that happen.

He pushed himself off the ground with the little strength he had left. He managed to get to his knees and keep himself up using his arms to support himself, but he couldn't go any farther. He coughed up blood as his insides felt like they were being torn to shreds. He raised his head to look around. His eyes widened in horror at the destruction he failed to prevent.

"No..." He muttered as his entire body shook in fear. Tenrou Island, the place where the first Guild Master was buried and where the test to become an S Class Mage of Fairy Tail took place, but now, it looked like hell rose and occupied Tenrou Island as it's new home. The forest was completely engulfed in flames and the earth looked like several earthquakes hit it. It was amazing that the Island wasn't sinking into the ocean. "No..." Natsu growled. He looked over to his right and his heart felt like it just shattered at the sight of his nakama.

They were all sprawled across the area. They weren't moving. Fear set into his heart at their motionless bodies. "E-Everyone..." He called out to them, but none responded back to him. Looking at each one of his friends one at a time, he understood why they weren't responding to him. They were all...dead. "N-No..." Natsu's entire body shook at the realization. Each of his friends were covered in a pool of blood and the eyes from those that were facing in his direction, were lifeless. Tears started cascading down his cheeks. "N-No...NO!"

Natsu couldn't hold it back anymore. The tears were now streaming down his face like two waterfalls. He continuously slammed his head against the ground. "Damn it! Damn it! DAMN IT!" He cried. He dug his nails into the ground and clenched his hands into fists, dragging some of the dirt along with his motion. He couldn't believe he let his friends down. Because of his weakness he couldn't save them. Lucy, Happy, Erza, Gray, Gajeel, Mirajane, Elfman, Lisanna, Wendy Master, everyone. He couldn't protect them. "I'm so weak! If only I was stronger! I'm sorry! I'm sorry, everyone!"

"Natsu..." A low, but cool like voice whispered his name making Natsu's eyes widened. He recognized the voice. He raised his head and looked over his shoulder up at the black haired man known as the legendary black magic user, Zeref.

"You..." Natsu growled angrily at him. It was all his fault. It was because of him, his friends were all dead. He wanted to beat the crap out of him, but his body couldn't do what the mind wanted. When he tried to move, pain shot throughout his body. He put a hand on his mouth and started coughing. He coughed up some blood and felt the red liquid fall onto his hand, as well as some drops fell to the ground below him.

"I'm sorry...Natsu." Zeref apologized. Natsu eyes widened at his apology, but instead of getting forgiveness from the fire mage, he was greeted with more anger.

"Your sorry? YOUR FUCKING SORRY!" He shouted, which only caused his body more pain, but he ignored it and continued. "Don't tell me your fucking sorry! You destroyed this island! You killed my friends and all you say is I'm sorry! I will never forgive you!" He coughed up blood again, but didn't cover his mouth with his hand this time and just splatted his blood all over the ground.

"Natsu..." Zeref muttered his name softly, knowing the pain he was in. Everyone he tried to get closer to will just be killed by his black magic. His curse was something he wished so much to get rid of. He never meant to kill his friends. After all, Natsu was supposed to defeat him before any of this were to happen. However, he wasn't strong enough to beat him. Natsu was the only man in the entire world that could defeat him. But he was way to weak to do so. He didn't want this, but he had no choice. If only there was a way to reverse everything. If only there was a way to go back in time. A realization just hit him. If Zeref remembered correctly there was a spell that could do such a thing. Granted it's a spell of black magic, but this could really be the only chance both he and Natsu have.

"You bastard...!" Natsu growled in anger as he fell down to one elbow, his body quickly losing it's strength. Zeref noticed he started to breathe heavily and he knew Natsu was close to going into cardiac arrest.

"Natsu...listen to me. I know a spell that will send you back in time." Natsu's eyes widened at his words and looked up at Zeref.

"W-What?"

"Like I said, it's a spell that will send you back in time. Natsu, you are the only one who could defeat me...but you have to get stronger than you are now. I will send you back in time two years before the day you meet Lucy Heartphilia. If you do not want a repeated performance of what just happened, then I suggest you train yourself so that all the battles you had difficulty in before this one are going to be easy as pie." Zeref explained.

"W-Why are you...?" Natsu asked, confused by what the man who killed his friends was suggesting.

"Like I said before, you are the only person in this world that could defeat me. I am tired of living with this curse. I want to die already but because of this curse I cannot. You are the only person who could kill me and finally free me from this curse. Please Natsu, if you do this, then it won't only help you, but help me as well. You are the only one who could do this." Zeref pleaded as he clenched his fists.

Natsu was stunned. The same man who took the lives of his friends was giving him the chance to go back in time to get stronger. He would be an idiot not to take the deal. He had to. He owed it to his friends. There was no way he was going to let them down a second time and he would make sure to protect and save all of his friends. "A-Alright." Natsu agreed.

Zeref showed a small smile. "Thank you." With that said, he closed his eyes and started chanting the spell. Natsu stared at him until a circle appeared on the ground around. The circle began to glow a dark purple color and then a bright light rose from inside the circle where Natsu was. Natsu watched in awe and it turned to surprise when he felt his body changing.

"W-What happening to my body?" He asked, panicking a bit.

"Your body is changing back to what it was back then. You will, however, remember everything you have experienced up to this point. It is best that you do no tell anyone that you know what will happen in the future. It would not only cause chaos, but there could be a possibility that the meeting between you and me will never happen and your friends will die just like they did today." Zeref warned Natsu who's eyes widened. He turned his head toward his friends and frowned.

"Everyone...I promise...I promise that I will protect you this time...I will become stronger...and I will defeat you..." He turned back to Zeref and glared at him. Zeref wasn't fazed by his glare, but smiled.

"Yes...let us hope you do..." He clasped his hands together and finished his chant. "Forbidden Black Magic: Tempus Revertere!" He shouted and the light got brighter until Natsu was engulfed by the light. Once the light disappeared, so did Natsu. Zeref let go of his hands and felt exhausted from using so much magic at once. He fell backwards and landed on his back. He looked up to the black smoke covered sky and closed his eyes. 'It's all up to you, Natsu.'

Natsu closed his eyes when the light got really bright as he felt a strange sensation go up and down his body. When the sensation stopped, he began opening his eyes. When he opened them fully, he saw the clear blue sky. He blinked a few times to make sure his eyes weren't fooling him. They weren't. He sat up and looked around. Did he really go back in time?

"Natsu!" Natsu's ears perked up from the all too familiar voice of his blue furred friend, Happy. He turned his head around and looked over his shoulder to see the cheerful Exceed flying toward him, carrying a fish in his small hands. Natsu didn't care about that though. He was just so happy to see his friend being alive. In one swift motion, Natsu stood up and ran toward Happy, giving him a huge hug that looked like it squeezed the life out of the Exceed.

"Happy! I'm so glad your alive!" Natsu exclaimed making Happy confused.

"N-Natsu...I can't...breathe..." Happy managed to say through the hug and Natsu immediately let go of Happy and chuckled nervously, scratching his cheek.

"Ah...sorry..." He apologized as Happy tried to catch his breath.

"What did you mean by you being happy your alive, Natsu? Did I die? Oh no!" Happy began to panic at the thought of him being dead and everything was only a figment of his imagination.

Natsu laughed. "No, your not dead Happy, but you..." Natsu stopped when he remembered what Zeref said about mentioning anything about the future. "Nothing...never mind..." He looked down at himself and noticed that he was shorter now then he was a few minutes ago. He looked back at Happy and saw that he also looked younger and smaller. 'I guess I really did come back in time...' He closed his hand into a fist. 'This time...this time I won't lose to him...I will become stronger...I will protect my family...I will never lose to anyone again.'

"Natsu? Are you okay?" Happy asked finding his behavior odd.

"Mm. I'm great!" He replied with a wide grin. "Happy..."

"What is it?"

"Let's go on a journey!" Natsu suggested.

"Huh? Journey? Oh...you mean like a mission!" Happy exclaimed, excited about a new mission.

"No, not that." Natsu said, leaving Happy confused.

"Then what?"

"A journey to get stronger!" Natsu answered as he showed a sad smile and looked down at the ground. Happy was confused by his smile and even more confused at this journey he wanted to go on.

"Natsu...is something wrong?" Happy asked looking worried for his best friend.

"Mm. I'm fine!" Natsu looked back at him, this time showing him a true genuine smile. "I was just thinking of getting stronger. So strong that the Old Man has to make me an S Class Mage! That way...I can save everyone..." He said the last part in a low voice.

"Natsu..." Happy frowned.

"So...what do you say?" Natsu asked again. "Would you come with me?"

"Of course!" Happy exclaimed. "Anywhere you go, I'll go!"

"Arigatou, Happy!" Natsu thanked his best friend. "Once we finish packing, we'll head out!" Natsu told him and turned around to walk in the direction of their house.

"Huh? Aren't we going to tell the others?" Happy asked, flying toward Natsu to catch up to him.

Natsu stopped and the sad smile he had before resurfaced on his face. "No...this is something I have to do by myself. I don't want to get anyone else involved. I'll just leave a letter to the Old Man that I'm going to be gone for a while." He told Happy. 'I have to get stronger!' He clenched his fists tightly.

"Natsu..." Happy whispered in worry at his friend. Natsu turned his head to look at Happy.

"It's alright! Now, let's go!" Natsu grinned and ran toward their home.

"Ah, Natsu! Wait for me!" Happy called out to him as he tried catching up to the fire mage of Fairy Tail.

Dear Old Man,

I'm going on a journey for two years with Happy. I know this is sudden, but I need to do this. Please don't come looking for me. I can't explain everything right now, but I promise you I'm not doing anything dangerous and stupid. Please don't let anyone to try to come after me. I need to get stronger for reasons I cannot tell you. Thank you for Everything! See you in 2 years!

Natsu and Happy

Makarov reread the letter over and over again. Mostly because he couldn't understand Natsu's handwriting so it was hard to decipher what the letter said. However, when he managed to figure it out, he sighed and took a sip of his beer on his seat at the bar. 'That brat...doing something like this...what is going through that head of his...' Makarov took another sip and placed the letter into his coat's inside pocket. 'Oh well...as long as he is doing this to become stronger then I can't say anything wrong about that.' He smiled as he looked down to the liquid in his glass. 'Two years huh? It sure is going to be lonely without those two...I wonder how long it would be before anyone notices he's gone.'

Two Weeks Later...

"Master..." Makarov opened his eyes to see Erza Scarlet looking at him with a frown.

"What is it, Erza?" The Guild Master asked the red haired beauty.

"Some of us noticed that Natsu hasn't been coming to the guild lately and we were wondering if you knew where he was?" Erza asked.

"Hm? Oh...sorry no clue..." Makarov responded taking a sip of his beer. Erza was stunned to hear him say that with a easy going face.

"Master, how could you be so calm when you say that!" Erza shouted at him attracting the rest of the guild. "Natsu hasn't come back since we last saw him two weeks ago!"

"So? He's probably on a mission and you know how he is...he probably got himself lost and is taking so long to get back here." Makarov replied to her outburst. Erza wanted to argue, but decided against it and turned around to leave. Makarov eyed her. 'So, their finally noticing...to be honest I thought they would have noticed his disappearance a week ago.'

Two Weeks Later...

"Pops! Natsu hasn't come back! We should go find him!" Gray yelled as he slammed his hands down on the table in front of Makarov.

"Hm? I thought you hated his guts, Gray?" Makarov asked the Ice Mage.

"D-Don't get me wrong! It's not like I care about him...it just seems weird that he hasn't comeback after a whole month." Gray answered back crossing his arms.

"Gray...your clothes..." Erza scowled.

"Ah! When did I...?" Gray shouted in surprise as he was naked once again.

"Anyway, he's right Master. It isn't like Natsu to be gone for a whole month." Erza told him.

"Yes, I suppose that is true." Makarov answered closing his eyes. 'Hm? I know Natsu asked me not to, but what should I do? Tell them the truth? I guess I have to wing it...' Makarov opened his eyes as the entire guild was now awaiting his words. "You see...Natsu received a rumor about Igneel's location, so he went to go check it out. To be honest, I don't know when he'll come back."

"If that's true then, why did he say anything to us?" Mirajane asked.

"That's because he left immediately after hearing the rumor. He only told me about it because he was in a hurry and didn't want to miss him." Makarov lied through his teeth, which seemed to be bought by some of the guild. Erza, Mirajane and Gray all seemed suspicious about Makarov's story, but shrugged it off knowing their Master wouldn't lie to them about their comrade. Makarov sighed and then chuckled. 'I hope your journey is going well...Natsu...I wonder how strong you'll become in two years...' He smiled before taking a sip of his beer.

Two Years Later...

"We're finally here, Happy." Natsu grinned to his friend as he looked down at him.

"But why here, Natsu? I thought we were going back to the guild?" Happy questioned his pink haired dragon slayer.

"Mm. We are, but there is someone here we have to meet first." Natsu told Happy.

"Ah! Is it a friend of yours?" Happy asked.

"Mm. Yes, a very good friend." Natsu grinned. "Let's go!"

To Be Continued...

Author Notes: Well, I hope you all like this first chapter! I am proud to say that this is not only the first time travel Fairy Tail fanfic, but also the first ever Natsuxharem fic as well...unless of course I couldn't find one and until then, I will treat this fic as the first for both categories. For those who are wondering, these are the girls who I plan to include in the harem:

Lucy

Erza

Mirajane

Lisanna

Wendy

If you want anyone else to be part of this harem, no yaoi pairings though sorry, then please tell me in your review. Until next time!