A coming of age, romantic comedy revolving around ex-lovers who broke up with a promise never to meet again. But the documentary they filmed ten years ago gets the fame and they are by compulsion facing camera once more.

After Seon Yu's father committed suicide leaving behind a large sum of debt for them, Mother and 12-year-old Seon Yu move to a new place to have new start. After transferring to a new school there, she gets a lot of attention from prankster Jeong Guk. Will Jeong Guk be able to help Seon Yu out from the depression she's in?