Hmmm.....I don't like. This genre is not right for me. I felt like I was reading Elfen Lied, where everyone is super cute and happy, and the next moment super cute and psychotic (which scares the crap out of me). So if you don't want to read stuff like that, drop this instantly before you regret it.
The story starts off With Amano Yukiteru, who have a difficult time making friends and thinks himself a bystander as he writes stuff that happens around him in his cellphone diary. His imaginary friend, Deus Ex Machina, who is apparently is the Lord of Time and Space, decided to help him out by giving "the future" to him. Apparently, thinking this was a joke since there's no way his imaginary friend is actually real, he decided to brush if off until his diary began recording future events. He was suddenly thrust in a game along with 11 other participates, and forced to compete for the title of Deus's successor and become god.
And so....the chapter starts off weird. So I was thinking to myself, "Ok, it'll get better later on." It did not get better for me. Yuno Gasai, the main character's love interest (or more of a stalker) is just plain crazy. She's cute and then the next moment, she's psychotic Amano....is a crybaby like everyone say. I don't know if he did mature later on in the story or he became kinda psychotic as well. Other characters is ok compare to them and you'll grow to like them. There is also 2 other side volumes dedicated to the side characters' stories.
Story pacing is fast. There is no fillers so it keep the audience's attention at all time.
I enjoyed the story. But I know for sure I'm not rereading this again 'cause this genre doesn't fit well for me. However, I will rate this high because of the storyline and how well it was done.