Yuki and Zero are busy dealing with the Day Class students who are chasing after the Night Class students more fervently than ever due to the upcoming dance...

To prepare for the upcoming exam, Zero tutors Yuki, but all the while, she notices something wrong with him. Meanwhile, at the Moon Dormitory, Kaname confronts Maria in his room...

Maria's masked servant is none other than Zero's twin brother, Ichiru, whom Zero has not seen since their separation long ago...