Play Bona.

Bona, who became a game streamer from a classical prodigy, accidentally gets a chance to sing a commercial song, meets Piljun, a part-timer in the recording studio, and gets an offer to take on the vocals of the band. She becomes a star as Bona quarreled with Pil-jun and unintentionally created a 'swearing song' that became a hot topic on social media.