This manga is legend , although many people have different view but for me it was .
Overall the story was excellent . The mystery will keep you reading it more and more with brilliant character background ,development and mystery .

The story is about Deus ex machina , God of space-time ,He's dying and need to choose his succesor so he organizes a battle royale involving 12 participants and give them the ability to see future events in the form of diary notes .

ALthough there is some comedy but its mainly psychological mystery with many gruesome scenes , so avoid if your underage . Its anime adaptation is also excellent with great voice actors especially for Gasai Yuno .
The only thing it falls behind is some plot holes in ther series world mechanics and some unexplained events , but siding that its still an excellent read .
10/10