The story of the teenage girl Oh Ji Na, who get a note which can be used to take revenge on others by typing in their names. It involves handsome twin brothers Robin and Jay, the neighbors and good friends of Oh Ji Na. They are caught up in a love triangle with her. Robin is a rebellious teen whereas Jay is a model student and these two brothers have a secret that no one knows of. Oh Ji Na has a sister, Oh Sa Na, who gets involved with the twin brothers by falling in love with them at first sight.
The series focuses on the troubles these young teens faced with, their character development, and how they deal with those issues, by also learning life lessons. The protagonist Oh Ji Na also finds her true love along her life journey.