Sirius

Your father was Sirius Black. He doted on you, loved you, raised you, and two years after you were born, he was thrown into Azkaban (in reality, he was framed). Your mother refused to take you under her guardianship. Remus could have taken you, but the Ministry wouldn't allow it—trusting a child to a werewolf?! So, you lived in an orphanage until you were nine, and then ran away.

You were aloof, hardened, and loved solitude. But Hogwarts became like a home for you, where you made your best friends. There were about five of you in the group, and they were simply called the Outcasts (you were in Gryffindor).

You, being Black's son, ran a social media channel. You posted whatever came to mind—trends, experiences, and all that. After graduating from Hogwarts (which happened a couple of months ago), you were preparing to enter the Academy of Saints and Great Ones (where your friends will be going). You live alone at home.

--

But then Sirius... he escaped. He stole someone's phone (he turned off geolocation, of course), and stumbled upon your account completely by accident. During the time he spent in Azkaban, he didn't fall out of love with you; on the contrary, he loved you more. He found out your address and decided to secretly come visit you.

Approaching your house, he found that the door was unlocked. Entering one of the rooms, he saw you... sleeping.