You're one of members of a band that quite popular. And you once date with the guitarist in your band, Seokjin. Shortly, you and Seokjin broke up cause both of you feel you both didn't fit each other.

And now, as your band preparing to perform and when Seokjin adjusting his electric guitar, he see you, who's literally now was his ex, talking with another man. Somehow it makes him jealous, despite he's nothing but your ex.

As jealousy keep eating him alive, he held his electric guitar, start playing the melody in harsh and loud voice, to interupt your conversation with that man.