Jogakuen no Seiyoku Shokudou

The protagonist is an unattractive person who has been disliked by the opposite sex for his entire life. He works as a cook at an all-girls school and takes out his frustration by mixing saliva and hair into the food. One day, he is told by a fortune teller that his bodily fluids have the power to manipulate and arouse others. Intrigued, he tests his abilities on the most popular girl in school, who becomes a vessel for his sexual desires. As more girls become ensnared in his web of lust and domination, the protagonist indulges in his newfound power without question.