Dancing Blade

Momohime is a young girl who was found inside a giant peach as a child. She is traveling with her friends, hoping to learn more about where she came from. They have heard of another mysterious young girl named Nayotake who lives in the capital, and are heading there to see if there is any connection, but when they reach the capital they find it under attack by strange creatures! Just what is going on, and is there any connection between Momohime, Nayotake, and the mysterious creatures?