The Mori clan, the powerhouse of the Chugoku region, has finally begun to march towards Kyoto. Unless they can defeat Motonari Mori, who is a fierce enemy of Kuon, the alliance has no future. In addition to the Mori clan's powerful navy, the wisdom of Motonari, who seems to be able to read the future, overwhelms even Shino and Shizuku, and the teamwork of the three sisters, Mori Takamoto, Yoshikawa Motoharu and Kobayakawa Takakage, boasts a fighting force that surpasses that of Ayana and Konayayuki. Kensuke and his friends are forced into a tough battle like never before as a formidable enemy stands in their way like a giant wave. The biggest naval battle in "Sengoku † Koihime" begins on the raging seas!