Cone no Kurayami.

He was a cone, and good at his job. But he committed the ultimate sin, and had himself painted black against orange cones gone bad. Cones that tried to squash him, but got the cone he loved instead. Framed for directing traffic into a closed car park, now he prowls the street on blind, slightly uphill corners. An outlaw hunting outlaws, a bounty hunter, a Cone of Darkness.