Not all scars are on the surface
Chapter 1: Repeat
Harry walked down to the Potions classroom sullenly. Professor Dumbledore was forcing him to resume his Occlumency lessons with Snape.
He said that Snape was just uncomfortable with him seeing his past. Dumbledore had chuckled and joked that maybe the Potion's professor was worried that he might have saw his more sympathetic side.
'Snape doesn't have a sympathetic side, I doubt he even knows what the word means!' he thought as he traipsed down the stairs.
"Are you attempting to impersonate a herd of stampeding cattle, or do you simply not know how to slowly walk down a set of stairs Mr. Potter?" Snape asked from his place at the desk not even bothering to look up. Harry glared at the top of his head.
Finally the Professor stood up and walked over to where Harry sat down and without another word took out his wand pointed it at Harry and said 'Legillems,' Suddenly a wash of his own memories was brought up before Harry's eyes. He started fighting it of and as always accidentally entered Snape's memories. A memory of a much younger Snape eating alone at the Slytherin table in the Great Hall was before his eyes. There was a familiarity in the scene to Harry. Before he came to Hogwarts that could've been him. Then he say his father laughing with a much younger Sirius and Remus grief panged at his heart and he unconsciously delved deeper into Snape's memories. He could barely hear an adult Snape say "Get out of those memories!" But it was already too late, he saw an eight-year-old Snape sitting at a little table in a small room trying to write his name in cursive. Then he flashed to a scene where Snape and his parents eating dinner. There were two children there Harry didn't recognize, a little boy and a little girl. They almost looked exactly alike. The little girl was sobbing as the father yelled at her and everyone else looked on. The next scene, and the last one, was quite frightening. Young Snape was looking in a closet and inside the closet was the little girl. She was lying on the floor and she was sobbing, she was also covered in bruises and cuts. Then Harry was pushed out of Snape's mind. Harry had been pushed out of his seat. He looked up at his professor who had a strange expression on his face, like he couldn't decide whether to be mad at him or not.
"Get out, get out Mr. Potter." He said, his voice shaking. But Harry needed answers first.
"Sir who was that little girl in the memory?"
"I said get out."
"But who were those two little children?"
"Go back to your common room Potter."
"Why was that little girl bleeding? Who hurt-"
"GET OUT NOW!" He bellowed, grabbing Harry by the back of his robes, picking him up, and pushing him towards the door. When he got there he suddenly let go of him. He looked him in the eye, his face red and angry. "Despite what happened today Mr. Potter I expect you back here tomorrow for your next lesson, and tell no one what you saw in my memories." Then he slammed the door in Harry's face.