As the tag mentions, it is well and truly a melodrama, be aware. I have seen many comments describing it as a Rom-Com and thus being shocked at the course of the film. No, it is a beautiful melodrama film with endearing characters and a good melodramatic twist without too much dramatic overload. I even hesitated to actually categorise it as such. Overall it was very comfortable to watch and one of these films one could watch again for its warmth.

Unfortunately there is a plot hole nearing the end that kind of diminished the tears to replace them with incomprehension. As another comment mentioned. I have also noticed this wave of desire to create unique twists or endings to not fall within the "typical Korean romance story" but that is sometimes being done at the detriment of a sensible storyline.

Fortunately, here it was more of a missing explanation rather than a plot hole per se. Hence, for this missing detail I took out half a mark but the story still remains beautiful and warm in your heart. I hope you will be able to enjoy it and let your heart melt into the story just like I did.