Spoilers for the end of the series as a whole.
"C.C. I need to tell you something."
She glanced up from the television. "What is it?" She asked. "Hopefully not any sort of declaration."
"It's not really a declaration."
"Then what is it?" C.C. cupped her chin in her palms, watching Lelouch as he took off some of the heavier parts of his emperor outfit.
"My newest plan. It ends up with you being the last person left to tell."
"Go on."
"I'm going to be assassinated. By Zero."
She watched him for a long moment, a lump growing in her throat. But she didn't let it show. Lelouch watched her, equally silent, with a determined look in his eyes before she spoke again. "Oh, you're serious?"
"C.C.-"
"You don't need to explain yourself to me. This is your penance, right? For Geass."
"It is." He paused. "But, more than that, it's the final stage of my plan. The entire world hates me, save for a few. If I die, then that hate dies with me. And without it…"
"The world can finally unite, and you can have the world you desired for Nunnally. You know, you could do the same thing with a Code. Provided that you weren't planning a public burial, of course."
He smiled painfully, and she was sure that he had already considered that option, and discarded it. "You said it yourself, C.C. This is also my penance."
"I won't be there, you know."
"That's all right."