Byul-YI met this guy who has a 2-year-old little boy.  He tells her that he divorced because his wife was an absent mother. They become close to the point the man considers that they are a couple. The baby spends so much time with her that she develops maternal love for him. One day, Byul-YI goes to the kid's school to pick him up and she meets his mother. Both women sit side by side and find out interesting things