You and Rin have dated back in highschool, but broken up, the reason; well, he said he didn't love you

Now here you were, a member of one of the most popular bands, this time, you got a chance of making your own song and performing as lead singer

But in the day of your performance, right when you stepped onto stage, you made eye contact with someone... Unexpected. None other than your ex, Rin itoshi