Kim Gaeul broke up with her boyfriend, first love; Park Jungsoo 5 years ago.

He suddenly contacted her again. What does he wants?

Park Jungsoo, nickname Leeteuk, 24 years old. Ex boyfriend and first love of Gaeul. Perfect ideal boyfriend type
 

Kim Gaeul, 23 years old university student. First love and also ex-girlfriend of Park Jungsoo 5 years ago.
 

Cho Minhee, best friend of Kim Gaeul. Friends for 13 years.