Harry Potter and the Sorcerer's stone | Male OC insert.

Chapter VI: The Potions Master

"There, look."

"Where?"

"Next to the tall kid with the red hair and the kid with H/C hair."

"Wearing the glasses?"

"Did you see his face?"

"Did you see his scar?"

Whispers followed Harry from the moment he left his dormitory the next day. People lining up outside classrooms stood on tiptoe to get a look at him, or doubled back to pass him in the corridors again, staring.

There were a hundred and forty-two staircases at Hogwarts: wide, sweeping ones; narrow, rickety ones; some that led somewhere different on a Friday; some with a vanishing step halfway up that you had to remember to jump. Then there were doors that wouldn't open unless you asked politely, or tickled them in exactly the right place, and doors that weren't really doors at all, but solid walls just pretending. It was also very hard to remember where anything was, because it all seemed to move around a lot.

The ghosts didn't help, either. It was always a nasty shock when one of them glided suddenly through a door you were trying to open. Nearly Headless Nick was always happy to point new Gryffindors in the right direction, but Peeves the Poltergeist was worth two locked doors and a trick staircase if you met him when you were late for class. He would drop wastepaper baskets on your head, pull rugs from under your feet, pelt you with bits of chalk, or sneak up behind you, invisible, grab your nose, and screech, "GOT YOUR CONK!"

They had to study the night skies through their telescopes every Wednesday at midnight and learn the names of different stars and the movements of the planets. Three times a week they went out to the greenhouses behind the castle to study Herbology, with a dumpy little witch called Professor Sprout, where they learned how to take care of all the strange plants and fungi, and found out what they were used for.

Y/n didn't like the class that much though. He found it harder to concentrate on plants than actual live beasts. The plants moving didn't help either.

Easily the most boring class was History of Magic, which was the only one taught by a ghost. Professor Binns had been very old indeed when he had fallen asleep in front of the staff room fire and got up next morning to teach, leaving his body behind him. Binns droned on and on while they scribbled down names and dates, and got Emetic the Evil and Uric the Oddball mixed up.

Y/n thought the class was boring but it was better than Herbology.

Professor Flitwick, the Charms teacher, was a tiny little wizard who had to stand on a pile of books to see over his desk. At the start of their first class he took the roll call, and when he reached Harry's name he gave an excited squeak and toppled out of sight.

Y/n heard that he was a great dueler back in the day and thought that the professor was a funny little man in his own way. Y/n loved that class.

Professor McGonagall was again different. She wasn't a teacher to cross. Strict and clever, she gave them a talking-to the moment they sat down in her first class.

"Transfiguration is some of the most complex and dangerous magic you will learn at Hogwarts," she said. "Anyone messing around in my class will leave and not come back. You have been warned."

Then she changed her desk into a pig and back again. They were all very impressed and couldn't wait to get started, but soon realized they weren't going to be changing the furniture into animals for a long time. After taking a lot of complicated notes, they were each given a match and started trying to turn it into a needle. By the end of the lesson, only Hermione Granger and Y/n had made any difference to their matches; Professor McGonagall showed the class how it had gone all silver and pointy and gave Hermione and Y/n a rare smile.