Hyosung is a recently divorced mother her daughter Eunjung begs her the story of how she met her father so maybe Hyosung would realize that she still loves him, there are three guys Hyosung tells her daughter about high school boyfriend the best friend and the stranger and Eunjung has to figure out which is her father. ForewordHyosung (you) - recently single mother, 29 years old, lawyer.Eunjung - daughter, 7 years old.Lee Joon - high school boyfriend 18 First love.Seungho - the best friend, 19Thunder - the random stranger Hyosung meets age 19