A mysterious past. People who want to be together but can't- and only Amu knows why. Why can't she tell? What pieces need to be revealed? Who is the snake that binds Amu? Is there a mastermind behind this? Who really is Amu?

It was just a stray cat, so Amu thought nothing of letting it stay for the night. That is, until the cat was replaced with a naked young man, who claimed that she was his master!