"It Started with a Kiss" tells the story of two high school students, Zhi Xi (played by Ko Chen-tung) and Jiang Zhen (played by Ariel Lin), who share a kiss on a blind date that was set up by their friends. The kiss sparks a romantic relationship between the two, but they soon realize that their love is not without its challenges. The drama explores themes of first love, friendship, and growing up, making it relatable to audiences of all ages.