Both dramas focus on two couples who don't have a lot in common, who fell for each other in a short space of time, and involves a school-transferring theme. They also both feature the actor-musician Lee Jong Hyun from kpop group CNBlue, as either part of the main cast or as a guest role.

Kim So Hyun shows her excellent acting skills, while also portraying an almost typical high school teenager girl, with added problems including bullying and the loss of a loved one.

Not only does the main female protagonist care deeply for their child, they both feel deeply to bring justice to the world and shut criminals away. They also have their detective male leads who would rather run to their side than chase after a criminal.

Both of the main male protagonists try to find out more about their past and find out clues as to what caused a past incident to happen. And the main female leads always stick with the man's side, despite going through their own difficulties.