While having a drink at a bar, manga artist Yosuke Koshinomiya and editor Taruzo Itoto wander into the era of Oshaka-sama. With their lives targeted, they succumb to the devil's temptation and offer poisoned milk soup as a memorial service to Shaka-sama. The two chase after Oshaka in an attempt to find out the true identity of the devil while getting involved in various incidents. It introduces various demons that lurk within humans and dramatically reveals what demons are.