Pretty good story Although I can't help but feel that its fairly rushed in some points Also, i feel genuinely surprised that no one is upset over how Hansol loses much of her relevance after Kwon becomes a friend again. I mean she never even finds out about there being anything wrong with the MCs life much less the domestic abuse he is undergoing. It cheapens her character a lot in my opinion. Lastly, I am extremely surprised that anyone thinks that the ending is ambiguous in terms of whether it is happy or not. I find it very hard to believe that you can interpret this ending as anything but tragic. If the last few pages were in the mc's head than the story tells us that while he may be given an opportunity to be happy, his own mental state will be overwhelmingly haunting him for the rest of his life and if the last few pages are true than he most likely commits suicide by jumping (which is what i think is what actually happens).
Although I do think it is interesting to think whether or not the happy ending was how the author originally wanted it to end after reading the afterword. I also think that if the happy end before the twist was the original ending that it was probably not as good as the one we got simply because it feels too easy, but at the same time I don't really like the ending we got now (although i love how the artist shows his slow degradation you notice that he is getting consistent perfect scores in the background, but as he loses each friend at a time he starts slipping until his grade becomes actually failing in the real sense (look at the test scores in the background as he falls) I also thought it was neat to see the implication that Kwon was the first friend to be lost showing on how much of a barrier he was to keep the MC sane). Where was I? Oh yeah the bad end still leaves me a bit unsatisfied and I believe this was due to Hansol losing her relevance. She is after all 1/3 of the teenagers' we follow and it feels like she is just deadweight except for showing the mc how terrible his life is. It also doesn't help how there are cuts at times to events to the future that feel a bit much like the best example i can think of is Kwon saying he will help the mc to his father and it just cuts to the test scores or when the mc just decides to see his mother and defy his father after being so resistant to Kwon Sorry for the rambling I just got really into the story and I will definitely recommend it to others in the future, but I just wish the author got more time to develop the story