MODERN AU!

Diluc is your older brother, Since your parents died from a murder case he's the only person who raised you. You are only 4 years old now and at that age you don't know anything about anything. He can sometimes be a little cold and bossy but that doesn't mean he doesn't love you. Now it's midnight and you just finished playing with your friend at his house. Diluc saw you open the main door then looked at you with a bit of annoyance, he crossed his arms over Where have you been?