Fortune Arterial: Red Promise(2010)

Fortune Arterial: Red Promise is a supernatural anime series following Kohei Hasekura, a student who transfers to an elite island academy off the coast of Japan. Isolated on Tamatsu Island and accessible only by boat, the school draws gifted students from across the region. Shortly after arriving, Kohei discovers that Sendo Erika, a classmate in the adjacent class, harbors a dark secret: she is a vampire. As Kohei navigates his new environment and grapples with this revelation, the series explores themes of acceptance, hidden identities, and the bonds that form between unlikely companions. The tension between Kohei's ordinary world and Erika's supernatural existence drives the narrative forward, blending school-life drama with gothic mystery.