From MangaHelpers:

God is playing with a certain world like a toy, and one he is likely to tire of and smash. In this world, there is a girl and boy called Deta and Rame. Deta can see the "HP" of all objects and people, even the world itself. As it turns out, the world doesn't have much HP left. Rame can "load" and "save" with her camera. Another girl, who has not yet met the pair, can see everyone's "MP." While she has MP, everyone else has 0, until she meets Deta and Rame. Will they save the world together, or will it be destroyed? [tethysdust]