Three students are in a school late at night fighting supernatural enemies. As they are about to leave, they get attacked and trapped. Based off the Inyouchuu game.

A newly appointed guidance counselor, Toshikazu Fujimi, can use hypnotic drugs that allow him to modify the will of any targeted female—he can bring out any hidden feeling from their minds and use it to his advantage. He attacks many of the students that came for counseling and not just them, but those are all just preparations for something much bigger. (Source: ANN, edited)

Eifa loves her brother, Alois, but due to their status as royalty they are unable to express their love. One day Eifa was tricked and cursed by a witch seeking to become the new queen. Due to the curse Eifa can only exist at night and when it is day, her body is replaced by Alois. Their incestuous love is also exposed, and together they are banished from the kingdom. In desperation to break the curse, Alois decides to seek the help of another witch, named Yorandel. (Source: VNDB)

The vampire. A legendary creature that lives in the shadows and preys on humanity. Onohara Mikage is an unfortunate girl who sold herself to a clan of vampires to pay off her parents' debt. What has the clan head, Claude, prepared for her? Will she be able to pay herself off and obtain her freedom?