Overall 10/10
🌟🌟🌟🌟🌟

I really enjoyed Blue Birthday, especially after having watched Lovely Runner. It has the same time traveling concept in order to save the male lead. However, I enjoyed this more as the plot was more put together through to the end. One thing to take note of as well is that each episode is around 20mins! This drama is not a romcom, I enjoyed it for the way the mystery is solved and how the time travel topic is done. Yeri does not disappoint and Hongseok...well I think I fell in love!🤭