Code Geass: Lelouch of the Rebellion Picture Drama 1
Lelouch and his sister Nunnally have been cast away by the Britannian Emeperor to Japan as political prisoners. They were sent to the Kururugi Shrine to live. This is where Lelouch first met Suzaku, but it wasn't a pleasant first meeting.
This Picture Drama was attached to Code Geass: Lelouch of the Rebellion DVD Volume 1.
The events of this episode occurred before the events of Code Geass Episode 1. It tells the story of the first meeting of Suzaku and Lelouch.