Actually, I am...

Asahi Kuromine's life becomes complicated when he discovers that Youko Shiragami, a classmate he has a crush on, is a vampire and must leave school due to her father's rules. Asahi promises to keep her secret, but his inability to keep quiet makes this a difficult task. His struggles to maintain secrecy are further complicated by the arrival of other supernatural beings, who also need protection. Asahi must navigate these relationships while trying to win Youko's heart.