Yoshiharu Sagara finds himself in an alternate timeline in the Sengoku era, where some of the well-known warlords are female. Because of him, Hideyoshi Toyotomi dies, but he saves the life of a female version of Nobunaga Oda, named Nobuna Oda. As a reward, Nobuna makes Yoshiharu her retainer. But his claims of coming from the future brands him as crazy. Meanwhile, the lord of Mino, Dōsan Saitō, calls for a negotiation with Nobuna. Dōsan's servant, Mitsuhide "Jubei" Akechi, attempts an ambush which is foiled by Yoshiharu's foreknowledge. During the meeting, Yoshiharu convinces Dōsan to ally with the Oda clan by making Nobuna his heir. Nobuna, nonetheless, chases Yoshiharu with an unsheathed sword.