Sen Hoshino

In Japan, the vampire-hunter Saya, who is a powerful original, is sent by her liaison with the government, David, posed as a teenage student to the Yokota High School on the eve of Halloween to hunt down vampires. Saya asks David to give a new katana to her. Soon she saves the school nurse Makiho Amano from two vampires disguised of classmates and Makiho witnesses her fight against the powerful demon.

A powerful terrorist organization known as the Black Cross Army threatens to destroy the Earth, with only the defense organization EAGLE (EArth Guard LEague) able to oppose them. In retaliation, Black Cross Army destroys multiple EAGLE headquarters across Japan, killing all but five people. Now, these five remaining EAGLE members are called to form a secret, powerful team known as Gorenger, the only force left that has a chance to stop the Black Cross Army and their evil leader, Black Cross Führer.

The corrupt pure-love story revolves around Kasuga Takao, a bookish boy who loves the poems of Charles Baudelaire (the original author of the poetry collection "Les Fleurs du mal" or "Flowers of Evil"). One day after school, he discovers and steals the gym clothes of Saeki Nanako, the girl he has a crush on. However, he learns that Nakamura Sawa, a girl he loathes, happens to catch him in the act. Nakamura blackmails Kasuga into a contract, or else she will reveal his secret.