The sequel takes place 2 years after Lelouch was killed by Suzaku (as Zero, part of Zero Requiem), the world is at peace, with everyone forcusing on reconstruction. Nunnally is the Empruss of Britannia, while Zero is her knight, Kallen is a high ranking officier in the Japanese military, fighting to protect the peace that Lelouch died for, so that no one will have to suffer like he did again, while still have feelings for him. Ohgi is the prime minister of Japan, with Villetta as his wife with their daughter, Tohdoh is the Commanding General of the Japanese army, while being engaged to Chiba, his right hand in the military, Tamaki is running a successful bussiness with his bar. All of Lelouch's friends from Ashford Academy are having good life's, still wondering why Lelouch was doing some of the things he did, Milly and Rivalz have been dating for the past year, Nina is at the top of her class at the science academy and an assistant to Lloyd and Cecile.
One day, all of them are called to Britannia for some sort of gathering at the royal palace under the impression that Nunnally wanted them together as some sort of reunion. When they got there, meeting up with Nunnally and Zero, happy to them, but themselves not knowing about a gathering, they will suddenly summonded to the throne room by the request of Schnenizel (still under control of Lelouch's geass to obey Zero), when they got they got the room, there shocked to see Schnenizel on the throne. Zero demanding to know why, only to discover he's not under the geass any more and planning on taking over the throne as part of his plan to rule the world. Zero want's to know how he got over his command, and Schnenizel got some help from the Cardinal-A high order cleric of Geass who wants to rule the world as well. When the Cardinal steps of the shadows, everyone is shocked its Lelouch, but he stated that his not Lelouch, but his identical twin-brother Aruther vi Britannia, who was taken at birth from his mother by the order so that he can become being that can possess both Geass and the Immortal Code, a fet that only be perform by very few over the centuries.
Zero was about to attack, but he is suddenly attack by Aruther with his sword, slicing his mask in half, when it fell to the ground everyone is shocked to see that it's Suzaku under the mask. Seeing Nunnally shocked, he states before he was about to attack that Suzaku died and that his name is Zero. Suddenly he found himself being attack by Aruther, not able to keep up with his attacks. Aruther claims that a future should be strong in both Body and Mind, and that he's been trained in combat since he can remember by the order into the perfect warrior with power of geass at his command. He states that Suzaku only say that to ensure that he killed a monster (Lelouch) and not his best friend, whom truly understood his suffering and that will be a defender of justice to ensure that the suffering in his heart will stop, his love for Euphemia will remain strgon and Lelouch's spirit to stop hurting. He was about to kill Suzaku, but he had the idea to kill the one thing that most piecous to Lelouch and the one Suzaku must keep fighting, Nunnally. He claims that killing her will calm his pain of seeing Lelouch's face everyday and that get's to hurt him alot more than anyone would, and saying to Nunnally that her big brother can't protect her now. Just when about to swing his sword at Nunnally, she cried out Lelouch's name, a gun-shot knock's Aruther's sword out of his hand, Aruther shouted out "Who did that?", when looked over his shoulder, he saw a Britannian solider in full gear with just-shot gun in his hands. He asked "What in the hell are you doing?", then the solider replied "Protecting my sister". He removed his helmet to reveal than none other than Lelouch, even more shocked than ever before, Kallen claimed "How are you still alive?", he stated to her with a smile on his face "I've come back from the grave to protect someone piecous to me and make to sure that Schnenizel know his place?
That's just the beginning of it........offer me some ideas for later?