The images I used for the BG is from All Posters.it.

I chose the city in the night because Shiroyasha, Haruma's role of punisher, is his double identity in a scenario of darkness. That is the moment in which he uses his sword in order to let Justice prevail.

The other images are from Google.it and Zerochan.net . Them all are originally illustrated by the author, Kosumi Fujiko.