Love×Holic ~Miwaku no Otome to Hakudaku Kankei~

In a world where humans and demi-humans coexist, Amano Taichi has by accident drank some blood of Aoe Kuon, the most popular girl in the school.
Drinking her blood changed his body to have a special constitution which awakens demi-humans.
In exchange for protecting Taichi from whoever would target him, the Aoe house made him cooperate with awakening Kuon...