Fortune Arterial: Red Promise

In an attempt to put an end to his involuntary status as a wanderer, Hasekura Kohei enrolls in a high school that has a dorm. There, he's planning on making friends and generally enjoy what school life has to offer. However, during the first couple of days, he learns that the school itself houses vampires, and, as main characters are wont to do, he becomes involved in their lives. (THEM Anime Reviews)