In a world different from ours, there exists a world of magic that incorporates science as time passes. Now in this world, there exists a great city that boasts the greatest talents and intellects of this world. Theia, the City of Mystic Pinnacle. A super city that boasts of a billion population. It is the place where many faces of different cultures diverges. This is also the place of many legends and myths buried deep within. Yuki and Ruri, two young residents of this city have come to a restricted ruins in hopes of finding some treasures, only to encounter a mysterious girl who seems to have no memories of herself, or anything at all. They took the girl under their care, not knowing that by doing so, they will be embroiled by events much larger than what they can handle. This is the story of how the three girls who just wanted to play games will always be swept up by the conflicts of gigantic factions and hidden conspiracies running rampant on this city. An urban fantasy story with a mix of slice of life and action.