The demon appearing in the middle of town chasing after Shino wanting to eat him and the monks that hunt demons chasing after. They managed to escape from the monks and the demon return to its own human form who is Inukai Genpachi. Inuta Kobungo, Genpachi's good friend stated to Shino that three years ago, Genpachi and Kobungo's soldier team was attacked by a demon that served in the hostage crisis in the north eating people. Originally they were supposed to die but something stranged happened and ever since then, their bodies have some changes and they are immortality. On the other hand, the demon huntimg monk saw Shino with Murasame and hoping to get his hand on Murasame Sword. (thetvdb.com)