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Plot
Main article: List of Rosario + Vampire characters
Tsukune Aono is a normal high school freshman who is unable to get into any private school due to his poor grades. His parents soon enroll him to Yōkai Academy, which, upon arriving, turns out to be a secret school for supernatural monsters and mythological creatures disguised as humans. Tsukune quickly realizes his admission into Yōkai Academy must have been a mistake and fears for his life. He quickly becomes friends with the beautiful Moka Akashiya, who turns out to be a vampire attracted to the sweet taste of his blood. While at first Moka was upset upon discovering Tsukune's human identity, she realizes that he is the first real friend she had ever made. Despite Moka's vampiric nature, she is a kind girl and Tsukune quickly falls for her, and ultimately decides to stay at Yōkai Academy despite the various dangers while hiding his human identity from the faculty and other students. Tsukune soon discovers that when he removes the rosario around Moka's neck, she transforms into her true vampire form (her true personality is sealed, the kind Moka being an artificial persona), being stronger and more powerful than almost any other creature at the school, and Tsukune is the only person who can physically remove it to transform her. However, "Inner Moka" has an entirely different, often cold and merciless, personality, thus the rosary is only removed in dire emergencies.