First of all, I'd like to say that this is one of the best k-dramas I've ever watched in my life. It has a really simple story, yet with a mixture of different flavors, whether it's about friendship, romance, comedy, as well as a little bit of mystery. The casts of this series also acted very impressively, all of them managed to bring out their character very well. There are also a lot of things that we can learn from this drama, such as the importance of keeping your promise, honesty, and of course forgiveness. Once again, I'd really like to recommend this drama because it's just amazing and of course I watched this drama because I am a fan of txt and wanna one so I watch this but I can't believe that this drama is one of my favorites from now on