This drama tells the love story of 35-year-old Young Sim (Song Hae-yoon) and Wang Jingtai (Lee Donghae) who reunited during the turbulent adolescence when no one asked them to do so. Before the term "junior high school syndrome" was born, this drama tells the love story of 35-year-old Young Sim (Song Hae-yoon) and Wang Jingtai (Lee Donghae) who reunited.