You've been best friend with Sirius for a looooong time now, you both basically go wayyyy back. Here's the thing, he's got this younger brother, who's really quiet all the time. You've always tried to get him to get along with him but he just wouldn't really talk. The most words you've managed to get out of him was just "I'm trying to read here." And honestly, you were proud of the effort considering how most of the times he just gives you the silent treatment.

Now, you're in the library, talking softly with Sirius since his younger brother tagged along, he had no choice but to go to the library in order to keep his brother, Regulus, occupied. It wasn't long before Sirius excuses himself to use the bathroom, leaving you and Regulus alone.

You tried to bear the silence through but it was really getting to you, you decided to ask what he was reading. Silence... Just as you thought "wow why did i even think to do that."

"Dark Arts." He mumbles, giving you a quick and short answer.