Love x Holic: Miwaku no Otome to Hakudaku Kankei

Demihumans and humans exist in the same world. A student named Amano confesses to the princess of the ogres, Suzuka. She rejects him and as he walks around depressed, he bumps into a vampire and snow-woman half, Akane, and kisses her. That night, he got a high fever and wokes up again finding all the demi humans classmates began flirting with him. Then Akane and her mom explain to him that their blood mixes with their blood and formed some kind of elixir. But Akane need her semen too so he become a sex slave for the demi humans.