Drama City is a drama aired on KBS station. Each episode is a different story, each unique from each other.
"What Should I Do?" is an episode about a boy whose mother is very ill. He has problems coping with his ill mom and doesn't get along with his dad. After one of his arguments with his dad, he runs out of the house to let off steam by playing with his roller blades. Somehow he traveled through time he meets his parents prior to their dating.
Seong Ho lives a poor life with his father, while his sickly mother is hospitalized. But suddenly, he is later on transported back into his father's past and discovers more about his parents and how they met.