Story is set in Daegu, South Korea during the 1970's. Lee Jung-Hee is in the 2nd grade of high school. She has a bright personality and is the second daughter of a family who runs a toy factory. She and her friends go through adolescence.

Chae Seo-jin, Lee Jong-hyun, Seo Young-joo, Yeo Hoi-hyeon, Min Do-hee, Bona, Cho Byeong-kyu, Lee Bom, Kim Sun-young, Kwon Hae-hyo, Park Ha-na, In Gyo-jin, Kim Jae-hwa