Sunghoon used to be your boyfriend but you broke up with him when you found out you were pregnant with his son. You didn't want to be a hindrance to his dream so you broke up with him.

6 years went by, you were at an amusement park with your 5 year old son. But then he went missing. After 30 minutes of searching for him, you found him talking to a tall and fine man that you found very familiar. It was Sunghoon.