Shin Na has lived the life of a cosmopolitan, interesting, and accomplished woman, who has made her name as the author of a novel called First Love. She's lived in the United States and presumably done interesting things there, having a son that speaks perfect English. And then here's Hyeong Gu, living his fairly normal unremarkable life as just a gruff high school teacher, his only apparent claim to fame being that he's the inspiration behind her novel. Even though Hyeong Gu is the main character of this drama, his apparent existence only seems relevant as it compares to her life.