Kamikaze Kenshi Rosetta 3: Bakemono Neko no Kyoufu

Princess Cynthia, pursuing her brother's enemy, and Pierre, who cherishes and protects the princess, meet the kind-hearted Princess Julia. Princess Julia finds the monster cat-man who is Princess Cynthia's enemy and asks Princess Rosetta of the neighboring country of Pampalia for help. A great battle between Rosetta and the monster begins, but... it's Rosetta after all...