Okay, so this is my very first Harry Potter fic ever. So, if I get something wrong, could someone just review and tell me? I'm currently re-reading the series, but I still might forget just a bit.

Basically this is a Hermione/Sirius fic, time travel, mid-war(Second Wizarding war).

Chapter 1

It began as any other morning. Sirius Black, James Potter, and Remus Lupin sat in the Great Hall eating their breakfast, whilst their other best friend Peter Pettigrew sat at the Hufflepuff table talking to a girl, who ended up rejecting him. Peter was on his way back to his seat next to James, when out of nowhere a bright light lit up the Great Hall to the point where every person in the room had to close their eyes and shield them from the middle of the Gryffindor table.

As soon as the light disappeared, a large majority of the room looked at the four 7th years, expecting it to have been a prank, but turned back to the middle of the table in a few seconds hearing the scream of Harris McKinnon. Sirius could see nothing but a girl wearing tight jeans and a green tank top, with incredibly bloody hair grabbing Harris. As Harris' older sister Marlene, an ex of Sirius', went to help her brother, the girl turned on her pointing her wand and screaming, "Stupefy."

The Head Girl, Lily Evans and the girl James has been in love with for years, went to help her friend, and the girl attacked her as well. James, not being able to see Lily hurt, and Remus, a prefect and dear friend of Lily's, ran to the girl as well.

The Headmaster of Hogwarts, Dumbledore, rushed to stop the girl, but she attacked him seconds after sending a stupefy at Remus. But as she turned to James, she froze. Seeing her hesitance, James refused to attack as well.

The girl visibly tightened her grip on her wand, and Sirius slowly approached to where James was standing, halting a foot behind him. The whole room held their breaths as the girl (who Sirius could now see had a terribly bleeding arm, a large cut on her face, and multiple rips in her clothing, also covered in blood), slowly walked toward James as well. "Harry," her voice came out as nothing more than a whisper. "Harry, you're safe. I was worried about you. I didn't think you made it out." She lowered her wand.

Professor Dumbledore must have believed that James would be safe, because when Sirius tried to approach the girl, Dumbledore gave him a look.

"I-I need your help Harry." She was less than a foot away from him as she said this, "You can't let him get to me again Harry, please."

"I-I," James looked behind him unsurely, to look at Sirius, who subtly nodded his head to Dumbledore. Dumbledore gave James a look, and James cleared his throat. "He won't get to you."

"Oh Harry," she said before fainting. James quickly grabbed her, and the room all let go of their breaths.

James looked back at Sirius, unsure as what to do. "Professor Dumbledore, she, she's out cold," he choked out after he made sure she wasn't awake any longer.

"I see Mr. Potter, you can help us take her to Madame Pomfrey's, and Mr. Black, could carry the other young lady with us?"

It was then that Sirius noticed the incredibly blonde girl laid unconscious on the Gryffindor table. Sirius nodded his head and picked the girl up, following James and the Headmaster to the nurse's. The girl carried by Sirius was less scarred and covered in less blood than her counterpart. Once in Madame Pomfrey's, James and Sirius were kicked out, promised that they would be told once the girls woke up.

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It was two weeks later when James and Sirius were called to Professor Dumbledore's office. Once, inside,Dumbledore told the boys that he thought it best for them to talk to the girls when they woke up, and then Dumbledore had taken them straight to Madame Pomfrey's, where the young blonde girl was awake and the medi-witch was fussing over her.

"Oh hello," she said airily. "I was wondering when I would see you again," looking straight at Sirius she smiled.

"Umm, hello?"

"Oh no worries, I wouldn't expect you to know me. My name is Luna."

"Hello Luna," James said confidently. "We want to speak with you."

"You are already, aren't you?" That made Dumbledore and Sirius laugh.

"Well, I'll leave you boys to it then, come along now Poppy, let's take a look at the other girl." Poppy Pomfrey went ahead to see the dangerous girl.

"Goodbye, Professor Dumbledore." Dumbledore stared at Luna with disguised surprise. "It was lovely seeing you again. "

He smiled at her and then left.

"Well umm, Luna, we wanted to ask you a few questions," James said. Luna smiled in response.

"What's your full name?" Sirius asked first.

"I'm not sure I'm allowed to tell you, you know what you need to at the moment," Luna said, slightly less airily than before.

"Did the other girl hurt you?" James asked, wanting nothing more than to talk about the girl only he could calm down.

"Hermione? No of course not. We may not have been friends originally, but she would never hurt me. Or any innocent person; she has a hard time with hurting other people as well, although I suspect years of fighting them have trained her well enough to fight when threatened." Luna sounded insulted at first, then somewhat contemplative.

"Then who attacked you? Who attacked her?"

"We're in the middle of a war, Sirius, who do you think attacked us? But to answer your question, it was death eaters."

It was silent for a while; the boys didn't say anything, thinking about what she just said. A thousand questions stormed Sirius' mind; Why did death eaters attack two, seemingly innocent girls? Why did the other girl-Hermione?- attack the McKinnons? Why did she not attack James? And who's Harry? Luna didn't say anything, just looked around the room dreamily, and James also looked contemplative, probably wondering about this Harry person.

"Who's Harry?" James asked after those tense, awkward moments.

"Her best friend," is Luna's reply.

"Why-why did she mistake me for him?"

"James Potter, you look too much like him, all save for the eyes. You could be his father for all we know. Well, except you are obviously only, how old 17?18?"

James opens his mouth to say something, but is cut off by Sirius, "How do you know his name?Both our names for that matter. We haven't told you ours."

Luna's expression loses it's dreaminess, showing her obvious shock at Sirius' question, as well as her horror of saying their names when she shouldn't have, but quickly transitions back to what it is usually like.

"Hmm, I suppose your minds must be invaded by nargles, if you've forgotten introducing yourselves." Both James and Sirius open their mouths to say something, but Luna turns her back towards them and pulls her blanket up to her chest, before letting out a big yawn, albeit, noticeably fake. "If that is all boys, I would like to take a nap now, I am dreadfully tired. Fighting death eaters, generally does tire you out. Although, I suppose being safe here in Hogwarts, you wouldn't know this. Have a good day boys, and remember, the enemy is always near, but not where you would expect him to be." Luna closes her eyes, leaving the boys to look at her.

After nearly a minute, Madame Pomfrey walks by and notices the boys still looking at Luna, who's eyes were still closed. "Boys, what do you think you're doing? Still looking at the poor girl, she's been through enough don't you think? Get out of here before you bother her too much." And thus the two boys were kicked out of the room.

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Poppy Pomfrey had seen many things in her years, many different hexes and spells, but never had she seen anyone in as bad shape as this bushy haired girl. After wiping the blood off of her arm, Poppy had identified the source to be various cuts on her arm that spelled out the word 'Mudblood'. No doubt a cruel death eater attack. The more Poppy examined the girl, the more cuts and scars she found. One was so close to a certain area, that Poppy grew extremely worried about what had actually happened to her, although she didn't have time to check if what she thought happened actually did. She always had to stop some sort of bleeding or heal another cut. She could only hope that whatever happened to her would never happen to anyone else ever again. If she could, she would prevent it. But she can't, so she won't.

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It was nearly a month after the girls had dynamically arrived to Hogwarts, and everyone, but the Marauders (James, Peter, Remus, and Sirius), forgot about the two girls, when Dumbledore called James and Sirius to Madame Pomfrey's again, but this time, the other girl was awake too.

Dumbledore told them to talk to her, and that he and Luna would be back in twenty minutes, so they should hurry.

When they looked at the girl- Harriet, Helena, something like that-she wouldn't look back at them, but they did see a few scars on her, the most notable of which, was the one on her arm, spelling out 'Mudblood'. There are also some on the right side of her neck, as well as a large scar on her cheek. Those were just the visible ones. She wasn't the most beautiful girl, average at best. Her hair, now not covered in blood, reached past her shoulders, frizzy, curly, and a delightful shade of brown. Her eyes, also brown, looked sharp and watchful. She had paler skin than most, although not chalky by any means.

"Hello," James said tentatively. "My name is James, James Potter."

The girl looked at him with wide eyes, shocked, appalled, or maybe just confused. "You look so much like him," She said with finality.

"Who? Harry?"

"Yes. You look a lot like my Harry James." Then she turned her head slightly and looked at Sirius, "And would you by any chance be related to the," in a mocking tone, "Noble and Most Ancient House of Black?"

Sirius swallowed roughly, "Yes."

"Well, my name is Hermione Granger. I'm from the future. I came to change the past." She smiled somewhat dangerously, but in no way evilly. "I'm going to need your help."

(A/N I was gonna leave it here (such a nice place to end), but I don't want to do math homework :P)

The two boys staid frozen for a while, unsure what to say to that. They slowly turned to look at each other, both thinking the same thing: 'She must be mental.'

"Now, I know the two of you probably don't believe me," the girl, Hermione, said as if she knew exactly what they would think, "but if you bring Remus Lupin in here, Luna and I can tell the three of you, as well as Professors Dumbledore and McGonagall, why we need your help. I'm sure that you will help us." Her swotty attitude faded a little as she said, "Or I hope you do." She looked down as it quieted for a few moments.

James looked unsure, as if he wanted to believe her, but couldn't seem to. Sirius however looked straight at her, his grey eyes staring straight into her. It was finally James who spoke, "I'm not sure we-"

"Okay," Sirius interrupted James, who looked at him in astonishment. Sirius looked back and chuckled a little, not his usual barking laugh. "What's the harm in listening to her story? And there's no way she can prove to us that she is from the future unless she is." The two looked at Hermione again, who was content not trying to look as if she wasn't listening to what they were saying.

James sighed, "I guess."

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After around ten minutes of awkward silence, Luna, Remus, Albus Dumbledore, and Minerva McGonagall, the head of the Gryffindor House, were situated around Hermione.

She cleared her throat a bit, before holding her head up a little higher than before, "Like I said earlier, Luna and I are from the future. We want to fix what we know as our past. However, it is not due to the two of us that we are sent here. Quite honestly, I don't think either of us know how we got here." She turned to look at Luna who nodded her head before speaking.

"You see in our time, we're fighting Voldemort," the use of the Dark Lord's name draws terrified gasps from the three Marauders present as well as their head of house. Ignoring them, Luna continued on, "There was a prophesy, or will be a prophesy I should say, in 1980, about a boy who would defeat him and be born in the end of July. There were two couples in the order who's children would be born around that time, they both went into hiding, and both were found. One couple was crucioed to insanity, by Bellatrix Lestrange."

"The other couple, was found specifically by Voldemort," again drawing a gasp, "a year later. The father, wandless as he was, insisted on his wife and son to leave while he tried to hold Voldemort off. He was killed. His wife was also killed, but when he went to kill the young boy, it didn't work. Instead it backfired and 'killed' him."

"We assume it's because of his mother's love, the mother who died to protect him," Luna added.

"The young boy's mother was muggleborn and he was sent to live with his muggle aunt and uncle, not knowing he was a wizard until he was eleven. That was where I met him; his name was Harry, Harry James Potter," Hermione said looking straight at James.

"He and this boy Ronald Weasley, became good friends right away, although neither liked me very much. I was a year older than them, although also in my first year, and honestly a know-it-all. On Halloween, Ron made me cry and I spent the entire day in the lavatories. Well, until I got attacked by a troll. The two boys knew that I was there and instead of going to their dorms, they went to help me. They are Gryffindors after all." James smiles at the prospect of his son also being a Gryffindor. After that day, we were the best of friends. Long story short, we learned that our DADA teacher had hid Voldemort in his turban and was trying to get the Philosopher's stone. We stopped him and won the house cup. The next year, we were told that the Chamber of Secrets had been opened again. I spent most of that year petrified, although I did figure out what was happening, and Harry had managed to find it out as well. We learned our friend, and Ron's younger sister Ginny, had opened the chamber. She had found Tom Riddle's diary, who as Professor Dumbledore knows, is Voldemort himself. Through the diary, he controlled Ginny. With the help of Fawkes, the phoenix, Harry killed the basilisk and used it's fang to stab Riddle's diary, stopping him from coming back to life."

Hermione looked at Luna, with tears in her eyes. "The following years continued like this: Harry, Hermione, and Ron having to stop some evil plan. Of course third year, they had to-" Luna broke off. "Honestly, Hermione and I couldn't decide whether it was safe to tell you everything just yet, but I think you should at least know that in our future, Sirius and Professor Dumbledore, the two of you don't live either. Remus, or should I say professor Lupin, you have a beautiful romance with someone you felt you didn't deserve, a love I hope stays even if we change time. Sirius, you never had love, although Ginny suspected that you did love someone, although you were in the same position as Remus. Hopefully, we can fix that this time, especially considering it's more than obvious that she feels the same." Luna trailed off, having nothing else to say. The two girls looked at the five people in the room, gauging their reactions. Dumbledore, while somewhat wary, seemed to completely believe them, McGonagall seemed doubtful, and the Marauders all looked worried but unconvinced.

"How do we know you're not just making this up," Remus hesitantly asked Luna.

Luna shrugged, "Hermione would know more than me, even if I am a Ravenclaw. She always knew more about all of you, especially considering her connection to Harry. Although I believe that she would be like this either way."

Hermione took a deep breath and her eyes wandered a bit, trying not to look at them. "Okay, James Potter, you are probably the easiest to say something about, although none of it would be a secret. Your parents were on the older side when they had you. You have been partially enamored with a red-headed muggleborn named Lily Evans, but have only ever really had a 'crush' on her since your fifth year. You hated Severus Snape because of an incident on the Hogwart's express first year and you were also secretly envious of him because of his relationship with Lily. You were also the reason the two stopped being friends, because you pushed him so far, he resorted to calling Lily the word. But like I said, anyone could have known that."

She looked above Sirius a bit, "Sirius Orion Black, first Gryffindor of your family, never really been in love. There is no one you value more than James Potter, who is more like a brother to you than anything, although your friends Peter Pettrigrew and Remus also are very dear to you. You had high hopes for your younger brother Regulus, wanting him to be sorted into Gryffindor as well, but weren't terribly disappointed when he wasn't. Your relationship with him was really severed when he started avoiding you. You left your parents' house just last year, and you are now under the care of the Potter's."

She then looked at Remus, straight in the eyes, "You are a werewolf." The boys and McGonagall look at Hermione in shock. "You were changed by Fenrir Greyback, and have struggled with your lycanthropy since childhood. The Whomping Willow was placed in Hogwarts as a guard to the entrance of a secret tunnel to the shrieking shack, where you transform during the full moon. In first year, you became friends with James, Sirius, and Peter, and in second year they found out about your lycanthropy. By fifth year the other three became Animagi for you: James a stag, earning him the nickname Prongs, Sirius, named Padfoot, due to his dog-animagus, and Peter a rat, obviously wormtail. You're Moony."

After minutes of silence, Remus swallowed and said, "Fine we believe you. Now, how can we help?"

Okay so that's the first chapter. I know that they don't normally find out the truth this quickly, if at all, but I felt like it would be a nice change, I mean the girls are already in the past, altering it, so why not let the boys know. Now notice how they only went in detail for years 1 and 2. They haven't really revealed anything all that important. James doesn't even know who Harry's mother is.

Anyways, please review, comment, et cetera, et cetera.