Liked the first part of the drama. The second part is where it all started go to downhill. And the ending is the worst. A lot of plotholes.

- Where is won bin? He had a scene but it was cut for unknown reasons.


- What happened to the other 3 students who survived at the end of part 1?


- A giant sphere is supposed to be a big threat for them but they didn't even show how scary it can be?


- Chi yeol and Nara storyline is unfinished, they both lived and we didn't see a satisfying ending for them.. Chi yeol haven't even confessed.


- They just time skip for 2 years and suddenly all the spheres are gone? They're supposed to be the villains, and for the ending we just time skipped to the time where they're already gone? Lol


- CSAT OBSESSION IS SOOO UNREALISTIC. The world is literally ending and the students are still obsessed with extra points. And don't they have no common sense? they can't believe CSAT got cancelled when every building, school, streets are filled with human killing aliens?


- Why did they not grab their rifles immediately when they saw Jang Soo got shot? This show literally made them all DUMB at the last possible minute.

If you don't want to waste your time. I would not recommend this show.