Elf no Futago Hime

There is a world where humans and elves live together. Elves rule the world because of their intelligence and longevity. But one day, humans rise in rebellion and a big war breaks out. After a long battle, both countries decide to stop the war by a marriage of convenience. Arsura, a princess of elf country, is chosen as a bride. However, when she is on her way to the human territory, she and Willan, her sister and security guard, are kidnapped by someone! While elves and humans push responsibili