for people coming here to read the comments, all the bad reviews i'm seeing are unjustified.
besides what the plot might make you think, the story actually has a serious tone, it's not at all a "fun" torture story for the heck of it.
even to the latest chapter, it keeps making you rethink what is right and what is wrong, what is moral and immoral, when to choose vindication and when to choose forgiveness. the story also focuses a lot on manipulation behind the scenes, everyone is somehow secretly connected to everyone else, and it's up to us to slowly try to figure it out.