Losing A Best Friend

Yona was always with Su-Won and his band, but once he told her to leave his side because he got tired of her she found a new group of guys who were in a band looking for a female lead singer. At first she begged them to be in it until the Battle of the Bands were over then they could find a real lead singer, and they accept only because they feel bad. But as time went on, gig after gig she starts liking the band and wants to stay. But the thing is, will Hak accept her into the band knowing she only joined for revenge? Or will he let his feelings decide for him?