Hissatsu Shikakenin

Otowaya Hanemon runs an employment agency. One day, he hires a ronin by the name of Nishimura Sanai, as well as a doctor by the name of Fujieda Baian, both of them secretly becoming professional killers who work for Boss Otowaya in the Edo Underworld. The three of them begin working together to slay villains who have escaped justice despite their heinous crimes.