Iga and Koka have achieved their own development in a warring world. In their long history, the two Shinan forces were in hostile relationship with each other, but in Tensho 9th, Iga was destroyed by Oda Nobunaga's "Tansei Iga's Rebellion". Iga Shinobu who survived slightly was taken in by Koka. Seventeen years later, the Warring States period ended, and a long peace had come to the world. Koga's long-eared daughter of Kendo, Ueno, the protagonist (protagonist) dreamed of sneaking into the day when she got out of work, and she practiced every day. And in the first mission chosen at the end, a major incident occurs that makes the fate of the main character and the village go wrong