The protagonist, Hakuno has to look for a way to escape from the world, together with his/her Servant. The story is told in different chapters from Caster's point of view with the chapter's title accompanied by description and picture related to the boss of the chapter. The game is set on the Far Side of the Moon Cell, where BB used her abilities to create the Sakura Labyrinth. She brought over various Masters and Servants from the Moon Cell Holy Grail War on the Near Side, some taken instantly before their deletion and others brought during the sixth week. The story is more similar to a Sakura route like the Rin and Rani routes of Extra. It has been described as a kind of "Heaven's Feel" route for the setting and similar to Fate/hollow ataraxia in nature.