Seung-chan is discovered hiding inside a locker during the introductory session for the newcomers. He tries his best to explain his true motive with the dance moves he learned by secretly watching the club practice. The dance lesson continues for the members, concentrating on the upcoming competition. Being assigned to Hye-jin as a partner, Si-eun reluctantly accepts the challenge amidst her frustration.
땐뽀 대회라는 목표를 향해 달려가는 시은과 친구들.
하지만 갑작스러운 혜진의 부상으로 팀원이 부족하게 된다.
땐뽀 대회는 하루 앞으로 다가오고, 시은은 엄청난 묘안을 떠올리는데..
聚在體育舞蹈社團的練習室眾人，聽到從衣櫃處發出奇怪的聲音。圭浩老師將衣櫃打開後，大家驚訝地發現裡面竟然藏著一位男生。另一邊廂，社團練習結束後，回到家的詩恩，與母親因讀大學和就業的意見分歧大吵一架…
