Replay: The Moment It Starts Again.

A group of high schoolers forms a band as they near the end of their schooldays, but romance soon threatens their harmony. Lead singer Yoo Ha Young, whose viral YouTube cover song made her famous, wants to be known for original material. However, both her close friend and guitarist, Lee Ji Hoon, and the older keyboard player Gong Chan Young develop feelings for her. Meanwhile, bassist Lim Seo Eun and the band’s drummer Shim Tae Young also find themselves drawn to each other.