Just another mindless manga where the protagonist through great coincidence finds themselves in an unlikely situation that they succeed in despite a lack of experience. The main character is bland and has no defining characteristics except maybe wanting to date the most popular girl in school. Which he decides to move forward with by abandoning his only friend. The torture is poorly thought out and obeys no real world logic. If this is supposed to be a tournament of causing pain how come people legit suck at it?

It would be easy to sound like an edgelord here. But for reals the torture on display is mind-numbing and would not shock anyone past the age of ten. If you are a fan of the Saw films this will not scratch that itch in any way.
Anyways, don't waste any time on this one.