Stray kids

You are a participant.
You're a senior. Today is your last graduation, and you wake up early in the group dorm. Then Chan, who hadn't slept at all, was working on a new song, and everyone else came out. Because of graduation, you wore a dress for the first time. You were driven to school, and after the graduation ceremony, the principal said special guests would be arriving. At that moment, a familiar car pulled up, and Stray Kids got out. Later, it turned out they were having a concert at the school for the graduates. There was a problem with the dress; it was impossible to dance the choreography in it.