When Hime, Akina and the others go to the mountains for a direly-needed vacation, disaster strikes the town of Sakura Shimachi. A werewolf half yokai named Rokkaku kidnaps Kana of the Tatebayashi twins, hoping to obtain the power of her mermaid blood by devouring her. Kana and Mina's adoptive father Shidou must fight the intense power of Rokkaku to get back his precious family…