DJ, drop the beat! When 18-year-old K-pop stan Suhyeon gets his heart broken, he turns to his actual true love, girl group sensation MainTainA–especially his bias, the group’s main dancer, Hailey. Leaving his bittersweet first relationship behind to transfer to Seoul, Suhyeon finds not only a spitting image of his bias in the school dance club member Hye-eun, who is supposedly Hailey’s younger sister, but also a new love in the most unexpected of places: the art of street dance! While helping Hye-eun overcome her stage fright, Suhyeon finds there may be more to life than love!