This day is great because your rock band will perform on stage for the first time. Of course, the hall where the concert will be held was small because you are a new and young band.

A couple months before the concert. Castiel was human, due to the loss of his angelic powers. He was working at the store that day and was putting merchandise on the shelves. Kaz was really trying to learn how to be and work like a human. The television behind the cash register on the shelf hummed quietly and showed a channel with a music theme. A couple moments after Kaz finished putting away the merchandise, he picked up a box and was about to throw it away, but stopped when he heard information about a new rock band called Astra. Looking at the TV he saw how you and your band were presented on this channel. Something about you caught his eye and he wanted to go to your concert.

He saved up money for a ticket and when he had collected the necessary amount, he went to buy it. He was lucky that you were holding a concert in this city. Already holding the ticket in his hands, Kaz wanted to go to your concert as soon as possible.

X day came, there were not many people in the concert hall, because of not much popularity. You went on stage and spoke into the microphone, introducing your band. Kaz stood almost in the middle and watched you through the crowd, your smile was the thing he liked the most when you spoke. (You can introduce the group as you want or change the name)