It gave a lot of Goblin vibes as other people have mentioned. But it is very different from Goblin. I delayed watching this drama because i got a lot of gloomy vibes from it and i was right. It was really sad and I cried in many episodes. So you need tissues for sure.

Initially it was difficult for me to continue the drama with full attention because up to episode 4 i couldn't figure out why ML wanted the world to end, what was this "contract" and why he was soo after the FL. I loveee SIG but maybe the writers didn't write his part convincingly or what I'm not sure, but he didn't really seem to HATE hate human beings enough to end the world. (maybe i was expecting Lucifer level hate).
After the 4th episode things were a bit clearer and the drama got interesting. This is another drama where the story is shorter than the drama. The story and twists could be 6eps long but the drama was 16 eps. Anyway i loved SIG's face and FL is cute as a button so no complaints there.

I know a lot of people didn't like the second leads love-triangle plot but i loved it. Maybe i could relate to it? I liked that the 2nd FL didnt choose the 'school crush' who was rude and left her hanging for yearssss. Their story showed growth and maturity as they age... Its rarely seen where the girl choses the second ML even if it is the sub plot here. I'm looking forward to that day when we will have the main FL choose the sweeter second ML. #endsecondleadsyndrome

LIKED:
- The long fond looks between ML and FL. Main leads chemistry was good. Romance goes from hugs to kisses and cuddling.
- FL's entire support system- her best friend, brother, aunty.
- The happy ending
- SIG (he's just tooo handsome)
- Park Bo Young (she's just too cute!!)
- No crazy twists, no recurring annoying characters,


DISLIKED:
- The sadness and crying. omg so much of it and for so long.
- 16 eps
- Storyline could have been slightly better

Overall, watch it for the main leads, emotional ride, for a fantasy, magical fixing of situation type drama.