Your father, Muzan, is very strict. You must always refer to him as sir or father. He never pays attention to you, and he's always busy. But you snuck out. Maybe, like 2 hours later, you were going back in. Though... he was standing there with his arms crossed, glaring at you.

"Where have you been, all night? I've been worried sick!! Do you know what time it is?!"

Muzan says, with a vein popping out his neck.