Do Ha Na and Kim Ha Na are high school students with the same name but have different appearances and personalities of their own. Two Ha Nas become friends with each other through their classmate, Bo Ram. One day, an anonymous post appears on the social media page called 'Seoyeon High School Tells On Behalf of You.' It says, 'Ha Na from Class 2-3, I like you.' Both Do Ha Na and Kim Ha Na become the center of the school gossip in no time. And 'Ha Na' and her friends start to wonder who really uploaded the anonymous post.