i don't know where should i start. but this drama is the best, he can travel back and forth. Actor skill is Very Good they act like realistic.. I don't have much to say but if u looking for time travel and comedy i recommend this one. The actors/actresses were eye catching, especially the main characters. Yoo In Na and Ji Hyun Woo are absolutely adorable together. The only thing that I don't agree with what everyone says is Yoo In Na's acting. Don't get me wrong, her sob scenes were really moving, but when she wasn't sobbing, and she was just crying normally, it felt like she was forcing it. But other than that, she was great.