Code Geass: The Miraculous Birthday

Code Geass: The Miraculous Birthday, (コードギアス キセキの誕生日, Kōdo Giasu Kiseki no Tanjōbi) is a half-hour long picture drama.

Plot
After the events of Code Geass R2, Ashford Academy prepares for yet another school festival. Lelouch and his friends reunite for one last adventure to help prepare for the festival while narrated by Jeremiah Gottwald.

However, they soon find themsleves hostages of Neo-Chinese Federation nationalists as they take over the school. Lelouch concocts a plan to defeat the terrorists, during which some of the characters start noticing inconsistencies with the canon.

Meanwhile, Suzaku and Kallen fail to defeat the Eunuch leader (who appears to be a fusion of a human and a Gun-Ru knightmare frame) leading the terrorists. Lelouch then suspects he has a Geass as he and others move in to face the Eunuch at his headquarters (The same chapel from Nunnally Held Hostage). C.C. reveals that the Eunuch is armed with a scientifically unexplained artifact collected by Charles zi Britannia called the Thousand Man Silver Vase. After losing Nunnally and C.C.'s souls to it as well.

Lelouch finds a weakness in the Vase's power and changes into his Zero costume. While Rolo stops the Eunuch's sense of time with his Geass, Lelouch uses a subliminal Geass order for the Ashford Student Body to wear Zero's mask. When the Eunuch orders "Zero's" soul to be taken by the Vase, it overloads and releases everyone. The Eunuch tries to reassert his control by using a gun but Suzaku uses his "Spinzaku" kick to beat him down. In the end the student council succeeds and Lelouch bids his final farewell to his beloved friends, this being his final gift to them, and to everyone's shock, fades away along with C.C., Rolo, and Shirley. The remaining members realize this miracle is only possible on that particular day, December 5th... Lelouch's birthday.