Momohime was found as a baby inside a giant peach — a fact that has shaped her entire sense of identity. She has always wanted to know where she came from, and a rumor about a mysterious girl named Nayotake living in the capital seems worth following. Nayotake arrived under similarly unusual circumstances, and the possible connection between them drives Momohime and her friends toward the capital. They arrive to find it under attack by strange creatures of unknown origin. Whether these creatures are connected to Momohime, to Nayotake, or to something no one has thought to ask about yet is the question the rest of the story circles.