is a story in which shadows are living, shapeshifting creatures attached to us since the moment of our birth. Their purpose is to take care of humans and protect them.
But thousands years of this peaceful symbiosis is ended by a mysterious conflict – a few Shadows begin to murder their humans instead of protecting them. The only clue is a high school student who seems to be connected with all victims fate. Now it’s her duty to solve those crimes and stop them. But to do so, she has to get along with her own whimsical Shadow.