Hoshimachi Suisei: Into the Sui-Verse

After finding herself in a forest filled with monsters, an idol named Suisei Hoshimachi was saved by a godlike existence and is now living in a mansion of a noble. Several days later, she meets a blue-haired girl who looks exactly like her and she realizes that she's not the only Suisei Hoshimachi in existence and there are others with their own stories.