No one knows where the Time-Slit Ruined City came from.
It floats in a crack in time like a forgotten clock face, its walls studded with countless gates of fantasy, each leading to a different world: anime, wuxia, xianxia, Western fantasy, post-apocalyptic worlds, Cthulhu, steampunk... Every world beyond those gates is missing a "character."
Kusuba Chisaki wanders into this place and steps through a gate, becoming the "person" a certain world needs. At first, every world she enters is from a classic anime or game. She's become the standard-bearer of a renaissance!
When she finishes playing a role, she gains power according to her score. She can also use the characters she has played as her own transformation forms. And so, the greatest Pretender in the multiverse is born.
In the end, she reigns over the multiverse, becoming the perfect goddess of yuri.
Completed: Twilight Amnesia Tales
Ongoing: Sword Art Online