Rosario to Vampire begins with Tsukune Aono, an ordinary boy who stumbles into Youkai Academy, a hidden school where monsters live under strict rules and humans are not supposed to exist on campus. Because escaping would mean losing the only school that accepted him, Tsukune is forced to navigate lessons, rivalries, and the constant risk of being exposed as human while trying to find a place in a world built for the supernatural. Every hallway encounter can turn into a duel, a misunderstanding, or a test of how long he can keep his secret intact, and the academy’s hidden rules, hostility toward humans, and monster politics keep the story moving between comedy and danger.
The person who draws him deepest into that world is Moka Akashiya, a vampire whose rosary seals away a far more dangerous side. Around Tsukune, the circle keeps growing: Kurumu Kurono, a seductive succubus; Yukari Sendou, a young witch with striking magical talent; and Mizore Shirayuki, a quiet yuki-onna whose cold exterior hides a stubborn attachment. Their clashes, friendships, and misunderstandings turn academy life into a mix of school comedy, action, and harem chaos, with Tsukune caught in the middle of every supernatural disaster.