the irony that could perhaps describe mirai nikki would be when the audience becomes part of the play.

12 diary holders have been chosen to participate in a deadly game in which the one that would become victorious would become god. in order to win, they must fight each other, killing them or destroying their future diaries until only 1 is left.

these diary holders are normally the ones who would record their daily observations in life. some of them are reluctant to put their shoes on other people's business yet the others are participating on the events that they have seen yet only acting as a minor role, making them very much like audiences of a play. the irony strike when deus, the god of time and space, selected these 12 observers and placed them on the center stage.

it is here that we find out the lifestyle of each participant. yuki, for example, acts like a nonchalant bystander recording his observations on his daily life. he records what he sees, what he experiences in his diary. yuno on the other hand records the actions of her crush on her diary. her thoughts about him when she sees him and her thoughts when he's out of her sight. the other diary holders have their normal diaries related to their liking.

the 4th participant for example writes down his thoughts on his investigation while the 9th writes down how he has escaped the police. the deal is, when deus chose the 12, their diaries have been upgraded, enabling them to read down what they would write after a certain period of time has elapsed.

i think the main premise of the manga would be causality and its effect. how people can change the events that would be and how humans can change the inevitable by willpower. but it also delves on the human psyche. the thoughts of each people written down on their diaries would eventually reflect their inner self but shroud their appearance. not everything seen to the naked eye is what they really seem in their truest form.

a psychological manga that deals with how each of us views our daily life and how one can make change, one way or another, only if we are willing to change ourselves.