Usually I hate time travel because its just not my cup of tea. But I started this and I didnt regret it!! I love this drama so so SOOO MUCH!! It was so cute and it had action in it to make you wanna watch more!! I hope there is a season 2!! Story- Like I said before I dont like time travel but this drama make me wanna watch more of time travel. The story of it is just amazing and I wish it was longer and not only 20 episodes that 30 minutes long. Acting/Cast- The cast is amazing and it fits the drama. The actor who plays On Dal is so charming in my opinion!! (fangirls) Also, the actress who play "Nann-yeon" is such an amazing actress, I wanna watch more dramas of them two together!! Music- I love the music in this drama so much!! I sing along with it whenever it plays!! It;s one of my favourite soundtracks!! Rewatch Value- I actually rewatched this after I first finished it because I loved it so much!! Overall- I recommend this to everyone who loves a historical romance!!!