Author's note: Hey guys, what's up! I have a new chapter long fanfic that I'm going to release now! Don't worry I'll be continuing Mystic High School Book 2 soon, but for now I'm going to start this one, hope you like it~

Chapter 1: Natsu's Secret

Crocus, Fiore Capital…..

"Natsu-san are you feeling ok, besides the motion sickness, you've been pretty distant lately?" Wendy asked worriedly. "I'm fine Wendy, my arm just hurts." Natsu said with a smile. "I can heal it if you want." Wendy said. "Nah, its fine." Natsu said. "Can I at least take a look at it?" Wendy asked. "No, I'm fine Wendy." Natsu said suspiciously. "I'm going to look whether you like it or not Natsu-san, plus it's just you and me today so I won't tell anyone about your injury." Wendy said.

Natsu tried to stop her from opening his bandaged arm, but she ended up unwrapping it and found a black tattoo that seemed to be spreading. "Natsu-san what is this?!" Wendy asked in shock. "Wendy I haven't told you or anyone else but Happy yet, but I am Etherious Natsu Dragneel, also known as E.N.D." Natsu explained. "Natsu-san why didn't you tell us sooner about this!?" Wendy asked worriedly. "Because I thought you guys would probably fear me and hate me since I'm Zeref's brother, as well as his strongest demon, not to mention I'm far more superior to him." Natsu explained while holding his arm. "Natsu-san its ok, I know you won't hurt any of us, but please let me try and ease the pain, just so you're not suffering." Wendy said. "Go head." Natsu said back.

Wendy tries to treat Natsu, but it seemed to be getting worse.

A voice in Natsu's head started speaking:" Unleash your true power as E.N.D, I won't hurt your precious friend, just do it." Who are you and what are doing inside of my head?" Natsu said to himself. "I'm another side of you, mostly your anger, power and rage, but I'm you." The voice said. "Get out of my head, I'm busy." Natsu said angrily. "I think it should be the other way around, Natsu." The voice said.

Natsu started feeling even more pain then before and his body started to change. He grew a set of horns, the tattoo was spreading across his entire body and his eyes became red.

"Natsu-san, what's g-going on?" Wendy asked in fear.

"Let me out of here, I want to talk to Wendy!" Natsu shouted. "Nope, you've been out for quite some time, it's my turn now." E.N.D said. "Don't hurt Wendy, leave her alone!" Natsu said. "Shut up, your nothing but a voice now, you're useless and it's not like she can hear you." He said.

"Natsu-san?" Wendy asked.

"Yes Wendy?"

"You look different, Natsu-san, is that good or bad?" Wendy said.

"Well let's see…..it's bad." He said while laughing.

"You're not Natsu-san, he would never act like this, so who are you?" Wendy asked.

"I'm Etherious Natsu Dragneel or as most of you know….E.N.D." he said.

"Leave Natsu alone!" Wendy called out.

"I've been waiting for such a long time to come out, no way am I leavi- He stopped as Natsu said something:" Run away Wendy before it's too late!" "Natsu-san?" Wendy questioned. "Go now, I don't want to hurt you and I don't have enough strength to keep E.N.D in control, so go now before something happens to you." Natsu said weakly.

Wendy eyes filled with tears and she hugged Natsu. "No way am I leaving you, I'll protect you and stay with you, so please don't push me away like that." Wendy cried. "Wendy…"Natsu said. "Please Natsu-san, you can fight him, you're strong if not stronger so please try!" Wendy cried out.

"Sorry Wendy, but Natsu says goodbye." E.N.D said as he knocked her out.

Tartaros ruins…..

"Huh, where am I and what happened to Natsu-san?!" Wendy questioned.

"Ah, you finally woke up Miss Marvell." Natsu said. "Please just call me Wendy and why are you doing this?" Wendy said. "Well Wendy, I've been itching to get back into action and what better than taking over the world!" Natsu said. "Then what do I have to do with this Etherious Natsu Dragneel-san?" Wendy asked. "Natsu is fine, and your involvement is to be my girlfriend." Natsu said. "G-Girlfriend?" Wendy said as she was extremely flustered. "Yep." "Fun fact Natsu actually wants you date you too, but well you know his situation." Natsu said. "Natsu-san l-likes me back and so do you?" Wendy asked. "Guess so, but only one of us will be lucky, and that's me!" Natsu said. "Natsu-san I like you, but I like the old Natsu-san more." Wendy said.

"DON'T DO IT, PLEASE I BEG YOU!" Natsu said in E.N.D's head. "Look buddy there's no need to shout it's not like she'll hear you, and so what if I steal your girl." E.N.D said back.

Wendy slaps Natsu across his face and says:" You may look like Natsu-san, but you're not him!" "You're going to regret doing that!" E.N.D said.

"NO, DON'T HURT HER!" Natsu shouted. "Relax pyro, I'm just going to play around with her." E.N.D said deviously.

"Wendy come with me." Natsu said. "Why should I?" Wendy asked.

Natsu's hand was engulfed in flames that possessed a lot of magic power. "Would rather doing it the hard way or will you follow my orders?" Natsu asked. "His magic power is so powerful it's visible!" Wendy thought. Wendy nodded and they went to a library.

"What is this place Natsu-san?" Wendy asked. "It's my book collection, but we won't be reading today, instead we'll see how strong your magic is with this MPF." Natsu explained. "Um, sure, but is this necessary." Wendy asked. "Yes, now throw your strongest attack at it." Natsu said.

Wendy took a deep breath and entered dragon force.

"Dragon Slayer Secret Art, Shattering Light, Sky Drill!" Wendy called out.

"5000, not bad for your age." Natsu says. "That took up so much magic power." Wendy said exhaustedly. "Tired huh, guess humans get a lot more tired than we do." Natsu says. "Say, you want something to eat?" Natsu asked. "Like what Natsu-san?" Wendy asked. "Whatever you want." He said. "I'd like some strawberry cake." Wendy said while thinking of Erza. "Strawberry cake, I don't know how to make that." Natsu said. "Then what do you have in mind?" Steaks." He said. "I don't eat steaks Natsu-san." Wendy said. "Then what about strawberries, not strawberry cake." Natsu said. "Sounds yummy." Wendy said.

Natsu went and got fresh strawberries, but little did Wendy know that he had something up his sleeve.

Author's note: Well guys I hope you liked this new fanfic, I've been getting really inspired from the other ones I've been reading, so that's how this story came to be, sorry for not uploading one-shots like I said I would. But here's the next best thing! Hope you liked it :3