Shin Joon-young is now a top actor-singer while Noh Eul is a documentary producer.Noh Eul had a tough childhood; her father died in a hit-and-run prompting Noh Eul to quit school and make a living for her and her brother.
Its central protagonist is Ra Eun-ho artist but is caught up in the search for a mysterious troublemaker in the school, known as 'Student X'.
For So-Rim, her life changes completely after meeting with Han-Gyul, her voice gets her into a music industry with her two childhood friends and forms a band called Mush&Co.
The bass player of the famous Crude Play, Seo Chan-Young becomes the producer of their band and also falls in love with So-Rim. Her strength is hereditary and passed along only to the women in her family.
Under the help and training from Min-hyuk, she manages to control her strength to use it for good causes.
Min-hyuk and Bong-soon find themselves and their relationship growing into something more.
Through many encounters, Han-Gyul at first rejected So-Rim due to her age and due to the fact that they both don't know each other.