Set in the 1980s, the series follows Go Young-rye, a model bus hostess on route #100 and university hopeful, and Seo Jong-hee, a charismatic newcomer. Their friendship with each other and romantic entanglement with Han Jae-pil, their destined first love—son of a wealthy department store owner—lead to a coming-of-age tale of youth, love, and growth.
