Because, why not? Sirius and Remus are adorable here are some headcanons about their relationship, I might add some marauders or jily headcanons too.

He always wore a mask and no one's ever been close to taking it off, of course Blue has once. You decide you want to see the real him. Can you be the one to unmask the red haired boy? *First In Series. Next One Is Lonely*