Tsuki no Sango takes place in approximately the year 3000, when humankind arrived at the peak of its civilization, but is losing its will to keep living. Tsuki no Sango is a world where the events of Tsukihime did not occur. Tsuki no Sango is "a degenerated world where magecraft yet lingers". Tsuki no Sango has a Land of Steel type of world. The story follows a girl, called "princess" by those around her, living on a small island with a fifty-person colony and a shining coral reef. She is descendent of Moon people, and it focuses upon how her ancestor supposedly came to Earth.
