Elf no Futago Hime - Willan to Arsura 1

A planet exists where humans and elves coexist. The longevity and brilliance of elves make them the most powerful race on Earth. A massive conflict ensues when mankind finally rises up against the system. Both nations decide to put an end to the conflict through a marriage of convenience after a protracted conflict. The elven princess Arsura has been selected to marry the prince of her nation. However, when she and Willan, her sister and bodyguard, approach human land, they are abducted! A horde of monsters appears as humans and elves attempt to divide up the burden of duty. The elf sisters were taken by them. Darsh, their leader, is a half-elf, half-human hybrid. What does he want...? It's a new conflict now!