I will start it off with their acting, its believable and I can't think of a pair of actors that can perfectly fit their roles. The chemistry is just balance, it is not too much, and it does not lack at the same time. The two actors are pleasant to watch. The story is excellent, and the ending is breathtaking. The ending is just perfect and for me, remarkable. It will make you revive your faith in the deity or even be on fire for believing. Faith is all we need. Even if we don't understand things, we should always obey. There is indeed a reason for everything, and even if we turn our back to Him, he is always just to forgive us and give us a chance. In the end, what He only wants is for us not to forget Him and for us to have a prosperous life. However, the villains' stories here are entirely predictable. They have no character development and its cliche. I found myself skipping their parts, yet I still understand the flow of the story. It's like a cycle, and their intentions are not changing. Despite this fact, the story is still impressive.
It's worth the watch, and if ever I decide to rewatch it in the future, I would probably do it.

It's music soundtracks are perfect for adding to the overall vibe of the series. It's cute and refreshing. It helped to balance the cliche villain' story they made. Overall, it's a rewatchable and remarkable k-drama. Even it has mini flaws; it doesn't matter as it is perfect as it is.