Yoo Jimin, better known as Karina, a 29-year-old woman, CEO of a fairly important company in Korea, basically she was a billionaire

Kim Minjeong (you), better known as Winter, a 24-year-old girl, you were a single mother and Karina's secretary for 5 years

Years ago, you had had a one night stand with a girl, you didn't know that Karina was the girl you had slept with, but she had gotten you pregnant with her now child 4 years