Colors, Shades, and In-Between

Ikebukuro: that famed, almost unmentionable city of Tokyo where many secrets lie and are waiting to be unveiled. The people are moving, definitely moving, but the city itself is still. From where is such a phenomenon derived, do you ask? Why not read for yourself? (Note: This story involves all of the "Durarara‼" characters; I just put a basic four to represent the variety.)