Shiki Tohno, an ordinary high school student starts another day of school. At school he learns of a recent murder with the victim having what seems to be vampire marks on their neck. He also has a strange encounter with a girl named Ciel, whom seems to be his friend but he has no memory of her. On his way home from school he has a strange day dream of killing a girl he sees. He then wakes up in his sister's mansion, where he was moving to that day. He meets the two maids and they tell him he can't go out past 7 pm. Bored, he sneaks out to go get some magazines. On his way back he finds a man collapsed with teeth marks on his neck, he also sees a girl with a sword who looks like Ciel. Confused, he passes out. He awakes the next morning in his room again. He goes to read the newspaper but finds nothing on the incident, leading him to believe it was a dream. His sister also discovers about how he snuck out. On his way to school he runs into the mysterious girl that he had the dream of kil

Akiha reprimands Shiki in her own little way when he is late to breakfast and refuses food. She tells him that taking care of himself is more important than his studies, and they can hire a tutor if need be. Hisui confides that Akiha doesn't know he leaves the house every night....

Shiki and Akiha bid farewell to their maids and head out to meet Shiki's friends. Akiha is still pissed that she caught him sneaking in at 2AM the night before. He apologizes and she asks him not to do it again. If he continues to disobey, she will install a security camera...

Shiki and Akiha join Inui, Ciel and Yumitsuka at the train station at 10AM. Akiha and Ciel take an immediate disliking to each other, and soon, Shiki confronts Akiha about her rude behavior to his friends. He then thinks back to the night before with Arc. She had asked him on a date, but he replied that he already had plans...

The news reports that last night, a girl named Andou Tomomi was found dead. She had left her friends around 7PM to ride the ferris wheel.

Shiki is worried about Akiha, who has been acting strange since last night. He asks if it was something Ciel said. She gets up angrily but then faints. Shiki wants to call a doctor, but the maids remind him that Akiha hates doctors and assure him that she will recover with rest. Shiki is still concerned. Why would she get sick so suddenly? Kohaku explains that this often happens whenever Akiha suffers mental anguish. Shiki realizes that he is the cause and decides to stay with her tonight...

Arcueid flees, and Ciel explains that Arcueid was the White Princess of the True Ancestors until Roa offered her a rose with blood that caused her to undergo a cycle where she would awaken for brief periods to kill Roa and then go to sleep once more. Shiki goes to follow Arcueid but comes upon Roa and Akiha. Roa begins to overwhelm the two until Ciel arrives, but she is dispatched. Roa retreats and Ciel regenerates her wound. At home, Shiki finds that he was adopted, and that he swapped places with the actual Shiki Tohno after he went berserk. Shiki then goes to Arcueid, and makes love to her in her apartment. When he awakens, he finds a note with the words "Bye, Bye" on them.