Let's get things straight. I am going to introduce what is going on.
Lelouch and Rai were well known friends in the past. Lelouch and Rai were then separated after Lelouch's mother was assassinated, and Rai's mother and sister were killed; then they both went their ways. 7 years later, they bumped into each other in a casino. They greeted each other, talk about who knows what, and blah blah blah. Days went by:Lelouch re-meets Suzaku and, then meets C.C...and you know the rest. Lelouch calls Rai and tells him his about his plan about creating a group, (The Black Knights), Zero, and taking over the Britannia Empire. Lelouch asked Rai to help him by taking turns who would be Zero. He accepted because these two are tight. Now zooming forward, After Rai finished a speech with The Black Knights, that Lelouch wrote, he came in to find Lelouch undressing himself out of his school uniform. Then takes a turn for the worst...
~~ Next Chapter Soon