From the coming of the Meiji period, an inescapable prison, the Gokumonjou, has been established to offset the soaring crime rates that the new era has attracted. Serving as the ferrymen are the Kumou brothers: the eccentric family head. The kid that is noble although reckless, Soramaru. Chuutarou, and the most youthful. The 3 lead resides together with their housekeeper. But buried in the long record of Oumi could be that the legend of the frightful"Orochi," that a serpentine monster that awakens every 3 hundred years in an individual vessel. Unbeknownst to Chuutarou and Soramaru, until it fully revives the Kumou family's true job would be always to seal the Orochi off --and also the entire world will soon be plunged into destruction. Following the monster's next resurrection, the Kumou family has to find the fix.