The kdrama's only flaw is the fact that it ended up leaving several gaps empty. I was hoping to see a little more of the protagonist when he returns to the current year, but I also think this could be a big wild card for a possible second season ??????. One of the best kdrama I've ever seen, I cried my eyes out in some episodes, it brought me an inner peace that made me become immersed and finish the entire series in one go. Very good, I will recommend it to everyone.