When they were telling it is a combination of thriller and melodrama i thought it was a tough combination to get a good result but they did a very good job in showing both.
Story: The story was amazing it was a very unique plot but the problem with this drama is that there weren't proper cliffhangers for example if one episode had a really good cliffhanger but the episode that aired the next day wouldn't make an impact but this drama is good watching.
Acting:It was splendid there was no place for bad acting in this drama everyone portrayed their characters very well and the cast was perfect too i personally don't think anyone can replace this cast.
Music: Just like how the drama gives you chills the OST also gives you the same vibes and would get chills the OST for this drama was perfect.
Rewatch valuse: You can watch it as many times you want and still be scared and get chills its a very well mad drama.
Overall: It was a top tier drama but the onthink that was lacking was not giving good cliffhanger which might not keep viewers anxious for the next episode other than that it was amazing and it is worth your time they made the combination of melodrama and thriller very interesting.