K-POP Extreme Survival (K-POP 최강 서바이벌)

Ji Seung Yeon (Go Eun Ah) dreams of becoming a hip-hop legend and unexpected events set her on the path to achieving just that, although there is an added obstacle - she has to dress up as a boy in order to join a male idol group. In the process, she meets Kang Woo Hyun (Park Yoo Hwan), the leader of the popular idol group, M2, who captivates fans with a killer smile that masks his rude and selfish personality.

(Source: DramaWiki)