Author's Note: Okay, so I've been reading a lot of SherlockxHP crossover fics. I'm not really a writer but I had a few ideas so I decided to try writing my own. Like I said, I've read a lot of fics so many things have just become headcanon now. If I've taken ideas from your story or a story you know and have not given the correct credit, please let me know. I'll make sure to give you a shout out. Also, thank you to anyone that is taking the time to read this. It would mean a lot if you could give me feedback and suggestions because, as of right now, I don't really have any plan besides that it is set in the third book. Pointing out any typos, grammatical errors, inaccuracies or any other mistakes would be appreciated. I also have no idea what life in the UK is like. All of that knowledge is from the books, movies or the show. I apologize for the short chapter. This is really only an intro.

Disclaimer: I do not own Sherlock or Harry Potter. I'm just temporarily borrowing characters, concepts and settings.

Over the years, John Watson has become accustomed to the eccentricities of his flatmate. Explosions and other hazards at all hours of the night? Okay. Human body parts in the kitchen? Fine. Rude remarks and juvenile tantrums? Daily occurrence. John is no stranger to having important or startling information revealed to him at inopportune times, or as an offhanded remark due to Sherlock's notorious habit of saying things out of the blue, and with little regard for human emotion. After years of living with the self proclaimed sociopath, John Watson had thought he was immune to anything his flatmate could throw at him. He was wrong.

It was a calm Sunday afternoon in 221b. It was a day off for John so he was in the kitchen making tea. After a while he noticed something. It was too quiet. There were no experiments, no explosions, no gunshots and not even any violin. Sherlock hadn't had a case in weeks. By now, he should have been rampaging around the flat, bored out of his mind, but John hadn't heard a sound out of him all day. Slightly concerned, John took his tea into the living room to check on his suspiciously well-behaved flatmate only to find him in the same position John had seen him in last. Am I actually going to have a nice quiet day off today? John wondered to himself. Clad in his blue dressing gown, the consulting detective was stretched out on the couch, hands steepled under his chin, eyes closed, presumably thinking deeply about one thing or another. As John walked out of the kitchen, he spoke.

"John."

"Hmm?" John looked up as he took his usual seat by the fireplace. His eyes were on Sherlock as he lifted his cup to his lips.

"Make sure you're packed by tonight. We're leaving for Hogwarts first thing in the morning." John nearly choked on his tea. Of all the things he expected his friend to say at that moment, this was nowhere near any of them. Once his coughing fit died down John spoke.

"Wait a minute. What?. Sherlock you're a-?"

"A wizard. Yes."

"How did you know I-?" Sherlock sighed.

"I saw the signs John. I've had my suspicions for a while, however, they were only confirmed earlier today."

"And how was that?"

"Simple. You received a letter from your sister this morning. Last time I checked, there's no post on Sundays. Also, the window, that had been shut tight last night, was left slightly open this morning. Obviously, you had been too distracted by the letter and neglected to shut it properly." At this point Sherlock stood up and went to pick up the open envelope that was left on the desk as he continued his deduction. "No postal stamp and written on parchment, not paper, with a quill, and sealed with wax. Unless Harry has suddenly taken an interest in calligraphy, I do believe this letter was sent from the magical community. Additionally, these scratches here at the top indicate the letter being held in a bird's beak. Obviously sent via owl post." Sherlock finished his deduction with the same satisfied look he always wore when knew he was being clever.

"Fine. Okay, fine," John said. His tea had long been forgotten now as he struggled to wrap his mind around the fact that Sherlock Holmes is a bloody wizard. His flatmate was many things but he had never expected a wizard to be one of them. Nothing about Sherlock said, 'magic'. His clothes, if slightly dramatic were definitely muggle clothes. With all his talk of logic and reason, 'magic' is the last thing you would expect him to be. John took a minute to process things before speaking again. "So, you deduced that I am part of, or at the very least, aware of the magical world. I suppose I really shouldn't be that surprised, but why the hell, are we going to Hogwarts now?" Sherlock grinned.

"Good, John. Now you're asking the right questions! I also received a letter this morning. Apparently, Headmaster Albus Dumbledore is in need of a new Defense Against the Dark Arts teacher and has contacted me for the position." John stared blankly at his friend.

"You're going to be a teacher."

"Yes."

"You. You're going to teach kids. Real students. In an actual school."

"Of course."

"So let me get this straight. You, Sherlock Holmes, the great consulting detective who won't even leave the flat for anything less than a 7, are leaving for a whole school year to teach at a magic school in Scotland?"

"Yes, John. That's what I've just said. Do keep up."

"Okay, but why am I coming? If you want to go prancing around the magical world, grading papers and giving detentions, go ahead. Just leave me out of it!"

"Professor Dumbledore was also looking for a Muggle Studies professor so I volunteered you. After all, I'd be lost without my blogger." With that, Sherlock went to his bedroom leaving a stunned John Watson in the living room with an open envelope, and a cold cup of tea.

Author's Note: I really like the idea of Sherlock being a professor at the school and I thought it would be fun if John was too. I had the problem of figuring out their back stories. They can't both have gone to Hogwarts because they met for the first time when Mike Stamford introduced them and I'm trying to keep this fairly canon compliant. I thought of putting one of them in a different magic school but I don't think either of them would fit in at Durmstrang or Beaubatons and I really don't want to make up my own. I also needed a reason for John to have left the magical community so in this story I've made him a squib. I'm sorry if I anger anyone but it just fit the best. I figured this has made him extremely qualified to be the Muggle Studies professor.

How is it so far? Should I continue? Any glaring mistakes? Are they ooc? Anything in particular you want to happen? Where should I go with this?

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