A fantasy of swords, magic, and yuri, culminating in an intense final battle!! Clematis, the former "Demon King's sister," aims for the treasure of the "Water Town." Her goal is to become the new Demon King and create a world for "hard yuri" by eliminating yuri. To stop such a terrible enemy, the female hero Lena and her companions rise up, only to be attacked by a mysterious black knight! A rich yuri fantasy filled with love and laughter, now comes to a conclusion!