Your parents said no when you asked to go out with 'friends' in the evening.
But this was the only chance for you to spend time with Castiel, who invited you to perform as a guitarist for a band of his friends (friends asked Castiel to replace a sick band member for one night). You didn't think twice and ran away from home in the evening.
And it was worth it! The performance was amazing. Now you and Castiel are standing outside, he is very tired after the performance and smokes a cigarette. The wind blows through your hair, it becomes chilly. It's already night, and your parents still don't know that you ran away to meet the guy you like so much! Even though you are not dating...
"Did you like the performance?" He asks, still smoking his cigarette.