Yuki makes a decision regarding Zero, who is determined to fight his affliction until the very end. Yuki feels guilty for betraying Kaname.

Zero tutors Yuki for an exam, but all the while something is wrong with him. Meanwhile, at the Moon dormitory, Kaname confronts Maria in his room.

Cross Academy has two sessions, the Day Class and the Night Class; the latter consists of students who are beautiful, intelligent ... and vampires!

Yuki is busy patrolling the school grounds for Day Class girls who are trying to sneak chocolates to the Night Class boys for St. Xocolatl’s Day.

Day Class students are chasing after the Night Class due to the upcoming dance. Meanwhile, the Headmaster asks Yuki to show a transfer student around.

While the Night Class is at the Aido family’s vacation home, Yuki, driven by her desire to stop hurting Zero, tries to regain her memory of the past.

Kaname asks Yuki to be his lover. The Night Class guards begin accompanying her everywhere, and Yuki cannot hide her embarrassment.

When Zero suddenly leaves the school grounds, Yuki goes after him and roams the streets alone, until a mysterious mother and child appear before her.

Seeing the state Yuki is in, Kaname takes her from Zero, who is speechless when he realizes what he has done. Yuki cries, unaware of Zero’s secret.

Zero is tempted to sink his fangs into Yuki, and even though he's able to regain his composure, he finds himself the target of a teacher.

Yuki learns Maria's true identity. With this new information, Yuki accepts a deal to offer her blood in order to save Zero.

Yuki has a lot on her mind after almost being kissed by Zero. She asserts that she will not speak to Kaname until he admits to Zero’s innocence.

The Night Class goes to the Aido family’s vacation home during the long break, but Hanabusa decides to stay at the academy to investigate Kaname.

Yuki is continually haunted by visions of blood. Nevertheless, she is determined to find out about her past from Kaname.

Yuki now understands who she really is. Worried about Zero, she sneaks out of her room to find him -- but he simply can't accept what she has become.

A new ethics teacher arrives at Cross Academy. His atypical looks are all the buzz among the Day Class; even Zero has lost his usual composure.

There's a commotion in the Moon dormitory when the Night Class gets word that Takuma’s grandfather, a figure in the vampire world, will be visiting.

Maria’s masked servant reveals himself as a jealous figure from Zero's past whom Zero has not seen since their separation long ago.

Shizuka suffers a wound. Meanwhile, Yuki and Zero try to find out where Shizuka may have gone, but Zero's constantly thwarted by his Level E seizures.

After Shizuka Hio’s death, peace is restored at the academy. But when Zero returns, the vampires of the Senate accuse him of murder.

Senri returns to the Academy, but upon having a confidential talk with Ichiru, he becomes noticeably different from before.

Yuki wakes up a vampire, and her memory of her childhood returns. She now remembers her father, her mother and her brother.

The Headmaster calls for an emergency evacuation of the Day Class students, as Rido’s servant vampires begin attacking the students.

In order to protect the academy, the Headmaster confronts the head of the Hunter Society while Rido is still on the rampage.

Yuki decides that as Guardian, she must protect all the students at the academy and fight Rido.