主人公・新田剣丞が現代より転移したのは戦国乱世真っ只中、 ”鬼”の蔓延る、日の本と呼ばれる地だった。 天下布武を謳う織田信長をはじめ、名だたる英傑たちとの出会い。 恋に戦に絆を深めながら、列島全土で繰り返される数多の合戦。 戦友の死を乗り越え、試される覚悟と矜持。 鬼のいない太平の世を創るため「日の本連合」を結成する剣丞と仲間たち。 ――だが、 更なる災厄 が顕現する。 日の本全てを劫火で焼き尽くさんとする、 異史より現れし存在、”波旬”。 今こそ試される、真なる勇気! 今度の戦場は霊場の国、四国! 鬼若子・長曾我部 元親と共に黒鬼に立ち向かえ! 轟く渦潮は反撃の鯨波――

Kensuke trained hard every day under the tutelage of his uncle Kazuto. One day, when he held a sword he found in the storehouse, he lost consciousness. When he came to, he found himself in a place he did not recognize. He met a girl who introduced herself as Oda Saburou Kuon Nobunaga. She held out her hand to a stunned Kensuke and asked him to become her husband and accompany her on the road to national supremacy. They travelled across the country, racking up victories in this period of social upheaval. However, there was one enemy they could not defeat: the oni. These man-eating, blood-drinking beasts soon took over all of Japan, plunging the country into hell. However, Kuon and Kensuke vowed to continue fighting, issuing a written appeal to all the influential lords: “Samurai who are not afraid of even the oni, gather under me and let us save Japan together!” [From [url=http://omochikaeri.wordpress.com/2013/12/01/december-2013-eroge-releases/]Hau~ Omochikaeri![/url]]

After putting an end to the Northern Rebellion with the Oshu Battle, the Hinomoto Alliance finally sets out to pacify Echizen. They cross Kanagasaki, where they had once suffered a major defeat, and head back to Echizen. Waiting for them is Asakura Yoshikage! Demons, demons, and more demons blocking the path... Is the journey to Echizen, which has become a land of demons, a journey to the underworld? Keijiro Maeda, Murashige Araki, and Sen Soeki. New warlords join the fray one after another! A war history of fierce battles unfolds. The power, will, and determination of the heroes of the turbulent Sengoku period will now be put to the test!