tl;dr: A psychological manga that’s dumb and interesting in the first half but dumb and boring in the second half. 

This manga has two pretty distinct halves. The first half is centered around a social survival game, wherein there isn’t really any fear of death or any physical danger for the most part, but a lot of psychological danger. While I suppose this is a psychological manga, it differs quite a bit from most psychological survival games, in that it’s not really a battle of wits, because the participants are all too dumb for it to be so. The game master isn’t perfect either, but does a decent enough job overall. Hence, the manga for the most part is a simple loop of the participants trying something, screwing up, and hence someone being dealt a terrible punishment. It wasn’t all that intelligent, but it was interesting enough in a social torture porn sort of way. The characters were interesting enough with crazy secrets. Still, just having crazy secrets and being dumb doesn’t make them deserving of what they got, so it’s not like these are satisfying for the most part. But on the other hand, it’s not like there were any characters that were likable or easy to get invested in either, so it was interesting enough to just watch it happen without feeling too bad. And in the end, it came together well enough, wherein the mystery turned out to be pretty simple but clear enough, and there weren’t really any major plot holes or inconsistencies that couldn’t be explained by the fact that the participants in the game were complete idiots. The second half was similar in that it was still trying to be a social survival game, but it was a mess. The game master just did things haphazardly so it just felt overtly random. It tried really hard to have some deep message regarding the relationship between teachers and students or something, but it failed at it badly and in the end it botched the overall storyline completely as it all seemed like nonsense. The characters were also still dumb but also weren’t as interesting. The pacing past the beginning of this half was also too slow and there were a lot of plot holes and things that simply don’t make sense to the point it feels like the author was changing where he wanted to go with things from chapter to chapter. Hence, while the first half certainly wasn’t a masterpiece it was solid enough for what it was, but the second felt like another attempt at doing the same thing but failing at it. The art throughout was okay.