There was nothing on the rippling river bank except the reeds that hid everything.
A girl wearing a gray coat, jeans, and a knitted hat sat hugging her knees in a pile of reeds.
Who is she and where did she come from? No one knows the answer.
The sky above was overcast. Since the beginning of the new era of mankind, dark clouds have been hanging over this sky, day and night.
Concept: The human world is warm and cruel, and people can't bear to let go.