Dianne Kim or Kim Dae Hee is a 20 years old girl who loves music. She came back in South Korea after she lived in America for 7 years. She also graduated there and now starting to pursue her career. Her older brother is a singer in Korea. She wanted to meet him again and be like him. One month. She just only need a month to enjoy her vacation with his brother. But with this a short period of time, many things happened to her. Kim Dae Hee wanted to find her childhood friend named Jung Yoon Oh. That was also her secret first love but wasn't able to completely grew up with him because she moved in America at the age of 13. As she finds him, she met a bunch of boys who have different attitudes. There are dorky, annoying, awkward, cold, and cute.

How will these boys help her during her stay in korea for one month? Some of them holds a secret about her. Will they be able to reveal those secrets to her?