Yoon Doojoon had lived his whole life with Myeong Ji and has had a crush on her for just as long, he is now 24 years old and a professional DJ in one of Seoul's most popular underground dance clubs.

Doojoon still has a crush on Myeong Ji and now her sister Haeri, who left to become a dancer when he was only 13, has returned and brought chaos along with her.

Now that Haeri is back there is love in the air for one sister and jealousy for the other. Who will get Doojoon? And what will he do when he finally has to choose one?