![](https://i.mydramalist.com/qZyPz_4t.jpg)
![](https://i.mydramalist.com/x1JYw_4t.jpg)
Both dramas are mystery dramas that have the concept of going back in time to find the solution to a crime/ change the outcome of a event that already happened. On Reset the main leads are stuck in a time loop, while in blue birthday the main leads (inicially only the FL) can go back to a specific time window based on photos.