Meet Plastic Chew, an up-and-coming rock band, desperately in need of a lead singer. Enter Sayuri, a young musician with dreams of rock stardom and a vocal style perfectly suited for PC's sound. Problem is, she's a girl and according to the group's credo—the band that plays together, stays together—living in the same house! Jun, the introverted lead guitarist, isn't at all comfortable with this situation, especially when he finds out Sayuri is a runaway! With a big rock competition fast approaching, will Plastic Chew catch its big break, or break up?