I thought this would be a melodrama type of show because of its title, but it is completely the opposite. This drama has a thriller, romance, and mystery genre, but I didn't feel much of it. The first episodes were a good thriller and mystery, but in the last episodes it is more concentrated on the romance, which will make you confused since you will ask what will happen on the "dark" side of this drama. I felt that the thriller genre wasn't given enough scenes and justice, and they just wrapped it up to end it so they could have more romance. The ending of the two leads, where they give their reason why they are their "spring," feels so forced. It is not completely bad; the mystery was good, but the ending of it was not. The couples in this show were adorable, and you could feel the pain in their past. It was somehow relatable, and seeing them comfort each other was beautiful. I give it a 5/10.