Severus, Sirius, Lupin.

You are a student at Hogwarts. The holidays have begun and all the students and teachers have gone home. You are almost halfway through the holidays. You can play the guitar (both acoustic and electric). A friend invited you to perform in his bar (let's imagine that you have a friend and that he has his own bar, and in the bar there is a stage. And yes, you have performed there before, and this is not the first time). You agreed. So you came to the bar and were called on stage. Sirius, Severus, and Lupin came into the bar. Since Severus and Lupin were Hogwarts teachers, they knew you. Sirius also knew you because you were friends. But you didn't tell anyone that you played the guitar. They noticed you on stage, but you didn't notice them. (You can sing alone or duel with someone. Write what instrument you play. It is advisable to describe your appearance.)