Summary: Harry receives a letter which triggers his inheritance too early and Harry goes back in time - where he becomes the new DADA teacher. He has to figure out a way to return without letting anyone know who he really is. Will he succeed? (BTW, Sirius is alive).

Disclaimer: I don't own Harry Potter.

Harry Potter, Boy-Who-Lived, newly 16 year old wizard, was sitting cross-legged in his bed, munching on a piece of chocolate fudge cake, courtesy of Mrs Weasley. He was staring out the window of his room which was thrown open while the owls left from delivering his presents. A few seconds later, Harry saw another, unfamiliar owl fly in, drop a letter and fly off. Intrigued, Harry slit it open with the butterknife that lay on a napkin after cutting the cake, and pulled out the letter.

Harry Potter, it read.

You don't know me, but I know you. I am also from the future. (Harry scoffed.) If you are as sceptical as I know you are, I will tell you three things.

1) The passcodes to a map are "I solemnly swear that I am up to no good" and "Mischief managed".

2) The four Marauders are James Potter, known as Prongs, Sirius Black, known as Padfoot, Remus Lupin, known as Moony, and Peter Pettigrew, known as Wormtail and a traitor to boot.

3) Your patronus is a stag, Hermione Granger's is an otter, and Luna Lovegood's is a hare.

I also know that the war is coming up, so you need to trigger your inheritance one year early, so you can train up to fight the Dark Lord. To do this, slit your palm with a knife, and let seven drops of blood flow into the enclosed potion, swirl it and drink. This will not only trigger your inheritance, but take you to wherever you need to be to train. Hurry, you must do this before 1am on your 16th birthday. Good luck.

TRL.

It was a strange letter but Harry also decided to trust this person, whoever they were. He first grabbed his wand, and trunk and sat on top of his trunk. He spilt seven drops of blood into the potion and drank. At once, a searing pain burst to life in every bone in his body, and he let out a blood-curdling scream. However, any onlookers would only hear it for a fraction of a second, for a bright light enveloped his body and he disappeared, semi-conscious.

Break.

Harry clamped down on his tongue, drawing blood. He had not realised that he was no longer at the Dursleys, nor that blood was dribbling out the side of his mouth. He also did not realise he had landed at the front of the Great Hall in a very different Hogwarts, and that everyone was staring at him in different degrees of shock. The teachers leapt up first, Poppy Pomfrey at the head, and began to check him hurriedly. The students were next, chattering openly at seeing someone in this level of pain, because they needed to make sense of it all too.

Harry's senses became sharper as the pain dulled. "Wha-"

"Who are you, what are you doing here, and why do you look as if you've just come out of battle?" Albus Dumbledore said first, his eyes glittering with anger and fear for his students. He radiated protectiveness, yet anger as well. Harry just lay there in shock, but his brain was whirring. It was obvious that he was not in his time anymore, and sitting up, he noticed that there was one less teacher in the horde than there should be. The DADA teacher.

"I came to apply for the defense position, and I don't know what happened, I'm normally fine with Portkeys."

"Are you sure you're fine, as we'd better take this up to my office?" Dumbledore asked.

"Fine," Harry muttered, only noticing the students gawping at the scene.

They walked up in a solemn silence, teachers flanking them and taking sideways glances at him, as if he were about to whirl round and avada kedavra them all. Which Harry seriously felt like doing, if they didn't stop staring. It was bad enough back home, for Merlin's sake!

When they got to Dumbledore's office, he stared seriously at Harry, and he felt as if he were a first year getting scolded.

"Who are you?" was the first question that came out of Dumbledore's mouth.

Harry thought quickly. "Harry Remington," he replied. After all, people were least likely to link him to Remus. Jameson was too obvious, as were Evans and Rettop.

"Why are you here?"

"I want to take up the defense professor's position." Plus, he could train in the room of requirement, and the library was available to him. Even the restricted section, if he were to become a professor.

"Why were you having a- seizure, should I say- when you arrived?"

"I honestly don't know, I've never had a reaction to magical transport before."

Dumbledore placed a sheet of paper in front of him. "This is a short quiz to find out if you're qualified to become a teacher here. You may begin."

Harry opened the paper apprehensively. The first question read, what is a boggart, and how would you repel one? Harry could have laughed. This was easy! In high spirits, he finished the paper easily and handed it to Dumbledore.

The old man looked it over and stroked his beard in thought. "Well, you seem to be our most qualified defense professor in a while. I expect great things from you, Professor Remington. Welcome to Hogwarts." With that, they shook hands.

Break.

Harry was lying awake in the newly-assigned defense chambers. He tossed and turned for a while, then decided to get out of bed and unpack. Besides, it was almost 5:30, which was the time he usually got up at the Dursley's anyway.

Harry then realised that he did not have a set textbook for all years, but resolved to ask Dumbledore later. He pushed that thought out of his mind, and set to work unpacking his things and laying them out. He decided to tackle the classroom first. He put his stationery in the drawers, and put the Sneakoscope on his desk, as well as a picture of he, Ron and Hermione. He also put a photo of Ginny on the desk. Not many knew it, but Harry had secretly asked Ginny to become his girlfriend. She had agreed. He decided against a photo of James and Lily, since they would be his students. He then took out an unopened letter. Wait, a letter?

It read, Dear Harry,

No doubt you have found yourself in the past. You have arrived in the year 1974, when your parents are in their fourth year.

James, Sirius, Remus and Peter have not made the map yet, so your secret will remain safe. You will spend a year at the school, with the room of requirement as your training base. Just ask for Harry Potter's training room.

As a side note, I love your surname! Remington. I will tell you a snippet about myself. Remus Lupin was my dad.

Anyway, I have enclosed a parchment that you can write on and I can reply. You can ask anything, but please remember I need to eat and sleep too, so don't ask too many questions. Besides, Aunt Hermione will have my head if I reveal too much about the future.

Good luck!

TRL.

Harry's mind was whirling. Remus had a child? But then he noticed the 'was'. Remus died? A tear rolled down his cheek in sorrow and he wiped it away hurriedly.

Aunt Hermione? Did he marry her? Or Ron? It was more likely to be Ron, especially because he was in a relationship with Ginny anyway.

He was in 1974 as well! His parents' fourth year. The thought of Peter the traitor turned his stomach, but on the other hand he hadn't done anything yet. So they could have a clean slate. He could also see his parents! Although Lily was likely to be Snape's friend. Snape wasn't yet the greasy git from the future, so Harry was willing to give him a chance too. He could learn more about his parents anyway, and that was most important.

Harry returned to decorating and left the classroom as a happier teen. A teen who would be teaching defense. Who hadn't yet graduated Hogwarts. Damn. How would he do this? The only thing he knew was a patronus charm, and nothing else. He collected a book, read, and tried out spells with his matured magical core until he got them under control and he could do most sixth year spells with ease, and some seventh year ones too. He glanced at the clock, and jumped up when he realised it was 7:30 am. He then headed to the Great Hall to face his first day of teaching.

Alright. My first proper fanfic. I want to know if I'm good or an absolutely rubbish writer, so please review!

Luna Lupin-Black.