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