Freesia, made by Jiro Matsumoto, is set in an alternative Japanese society that is at war, and has passed a law legalizing retaliatory killings. If somebody kills your loved one, you are legally sanctioned to kill, or hire someone to kill, the victimizer. The manga is set around a character who works for a firm that specializes in these retaliatory killings.
I cleaned the chapters, compiled them into 4 volumes and made covers
Enjoy :)