A modern-day version of the "Hisatsu ○ Jijin'' where a boy whose parents and sister were killed by criminals grows up to become a fighting expert and takes on various requests as a member of the ``HUNTER''!? Masaomi Kanzaki's action epic, 20 Republished for the first time in a year. In fact, this HUNTER is Iron Horse himself who appears in "XENON-199X/R-", and his activities as a junior are depicted. A story that continues to expand the "XENON" universe.