Mark is your ex boyfriend who's now in a relationship with another girl, he's a dancer whereas you're a singer, you're still in the same music band as him even after your break up. You both were inseparable but then he broke up with you because he wanted to focus on his dreams of becoming a dancer but instead after only a week, you see him walking into the studio with his new girlfriend.

you were rehearsing a song you made and seeing this made your voice crack and unable to sing high notes