Strike the Blood

The story follows the adventures of Kojou Akatsuki, a vampire in high school who is a bit reluctant to show his powers, and Yukina Himeragi, a teenage Sword Shaman apprentice who is sent to observe him. It takes place in the Demon District in Itogami City, a man-made island off the coast of Japan that has a freely mingling monster populace. Kojou is suspected of being the Fourth Progenitor, a powerful vampire that could potentially disrupt the balance of power among the ruling three Progenitors. Kojou and Yukina befriend various monster students, some of whom are attracted to Kojou, and whose situations drive his libido that provides the source of much of his power.