Yoshiharu Sagara, a high school student, awakens in the midst of a violent Sengoku era combat. The renowned Hideyoshi Toyotomi saves him, but at the expense of the hero's life. With his last breath, the warrior begs Yoshiharu to take his position as a feudal lord. Yoshiharu vows to protect the chronology from drifting any farther now that the path of history has been altered. However, after saving Nobuna Oda—who he finds is actually the mythical Nobunaga Oda's female counterpart—Yoshiharu realizes he has been transported to an alternative universe in which majority of Japan's ancient warriors have been transformed into lovely ladies! Yoshiharu accepts to become one of Nobuna's retainers and aid in resolving the situation and returning home.