Flashback/Dream Sequence
Sirius was laying on a bed. The summer had just started, and it was already too hot move. He had taken off his shirt to keep cool.
The sound of high heels making it up the stairs had Sirius scrabbling for somewhere to hide. It was too late, because his mother was standing at the door.
"Your father will see you now."
Sirius hadn't requested a meeting. He spent as little time with his father as possible. If he refused this, he'd have more hell to pay.
All he could remember about that meeting was his father questioning about some missing item from his study. Sirius had no idea what he was talking about. His father became angry and picked up his cane. The Black's tried to leave no permanent marks. His cane was blunt enough to not break skin and leave scars. Sirius begged him to stop. Sirius even falsely confessed to stealing the item in order to get the pain to stop. Sirius would say anything to get the pain to stop.
When Sirius came to, he realized he was still in his father's study. It was the first time Sirius had ever passed out during a punishment. His house was quiet though. He heard no high heels of his mother, heavy boots of his father, or the barely perceptible shoes of Regulus. Sirius hauled himself up the stairs almost having to drag himself by the banister. Sirius was not able to tell how long it took him to move. He felt like he wasn't moving at all.
This had been the worst punishment in his whole life. Including the time his mother stabbed his hand into the table and told him that if he wanted to leave, he would have to pull the knife out himself. His mother had done this after Sirius claimed to be self sufficient enough to choose the high school he wanted to go to, not the private school she was insisting on.
When Sirius got to his room, he found a backpack on his bed. A note from Regulus on top read: 'Get out. They'll be home for dinner and I don't think you'll survive it if you're here when they come back. If you're reading this, I've already left. I won't say where I went incase it's intercepted. I tried to wake you up before I left, I tried to carry you out, but I wasn't able to. I've been able to stash some money away from the last several months. I've left half with you. Go live with someone you're safe with. I'll do the same. One day I'll try and find you again. I promise…"
Sirius grabbed a couple changes of clothes, a few items of sentiment, and Regulus' necklace from his room. Sirius took one last look at his childhood nightmare home. To no one but himself, Sirius whispered out loud. "I promise too. I promise to find you one day."
End Flashback/Dream Sequence