This story is about a girl who has to get marry with her mothers friend son and her enemy when she still child.Both of them did not like each other but their parents really wanted them to be together.They give them  a chance, 100 days to stay with couple status and date with each other.They have to be a couple in 100 days, if they can stay like that their parent will marry them if not they free to choose anyone to be their love.Can they fall in love in 100 days or they will found another person in their life? ForewordPark SoyeonKim Junsu Park GyuriKim Sunggyu