Books of Truth and Blue Cards

After Lelouch's death. Sorta an R3. Suzaku hates Lelouch with little regret of killing him. Then he stumbles upon his journals and he doesn't know what to believe. In the journal, there's a card telling him that if he succeeded to find the last one, he'll find Lelouch and the truth. On Nunnally's orders he goes. The empress is left with the task of clearing Lelouch's name.