Centers on Towa, a girl who barely feels anything of the world, and experiences it as if looking from the inside of an ash-colored box. But her life begins to change when she meets a mysterious young man.
感情のない少年“うつほ”、貴族の息子・光蔭、そして秘密を抱える少女・とわ。3人の出会いから、1000年続く物語が始まる…