sentences:  Outside of battle and dungeon exploration, the player can also return to Rei's room in the real-world part of the game and prepare for battle, view collectibles, pet her dog, and to enjoy everyday life through various angles.Rei and Mirai Hatada are summoned to Purgatory by an evil revenant, Anamnesis who wants to kill them and take their souls so that she can achieve revival, having died in the past.Rei awakens to the power of an executor and fights Anamnesis, however she accidentally kills her sister during the fight and so agrees to work with Mephis and Pheles, the managers of Purgatory, to collect Idea, and the demons agree they will revive Mirai if Rei collects enough and gives the Idea to them, though Rei only has a certain amount of time before Mirai's soul is taken by the cogs of renewal and turned into a new soul, which would be a new person altogether.