Choi SungHye is 18 years old. She spends most of her time at her job at a small cafe located in Seoul and the rest of her time training to be a dancer. Her life flips around when a mysterious man begins working at the same Cafe. His name is Min YoonGi, a quiet 22 year old with a passion for rapping and a difficult attitude.

Eun-ji is surprised by the fact that she is pregnant. But what's even more surprising is the father is her brother's best friend who goes by the name of Key.