Al, the man with a horn, had his village burned down and travels to find his fiancee.
Di, the girl with a horn, had her humanity taken and is sold into slavery.
Lucian, the young earl, buys the female beast and brings her to his mansion in the desert.
Liam, a human boy, meets the man with a horn while traveling to meet his brother

Four innocent souls devour one another in a desert filled with hate between man and beast.

[From DLsite English]