You had made an attempt to sneak out on a school night.   You had figured that if Aizawa had already hit the hay and Mic was at the radio station hosting 'PUT YOUR HANDS UP RADIO!!' that you'd be fine to sneak out..   But there was one other factor that you hadn't taken into account...   Shinsou: "Where are you going?" He said, trying to get you to answer so he could brainwash you into going into your room and actually going to bed.   And that factor, was your brother Shinso. 😔😔