In 20XX, on a particular day, Tokyo collapsed. Scattered across the city center were the 'mirrors' gateways to another world. A DOLL unit is formed to restore the collapsed city. This is the story of girls who throw themselves into battle to rebuild Tokyo. The story is set in a near-future Tokyo that has been devastated by the ""Great Collapse"". As a commander, the player will train and command the girls of the ""Doll Squad"", throwing themselves into battle together. The mysterious dreams the girls see, the mystery of the gate leading to another world, and the wishes of each girl.

"De:Lithe Last Memories" is a Rogue-like RPG game.