Code Geass: Lelouch of the Rebellion

Milly left the student council to focus in her career as a newscaster. Rivalz was asked to take her place as the student council president but it shows that Lelouch is the best fit for the position. Rivalz made a school festival on Lelouch's birthday, December 5. No one of them know about it. While planning for it, the Chinese Federation attack Ashford Acaademy and they are forced to stay inside the Clubhouse. Lelouch thought up a plan to defeat them. Lelouch's plan works at first but during the execution of the plan, Suzaku and Kallen's souls are taken in the 'Thousands-man vase' by the Chinese Federation leader. The other student council members hurried to the chapel and they saw the Chinese Federation leader. Nunnally and C.C.'s souls are also taken. Lelouch asked him to call his name, not as Lelouch but as Zero.