Alright, so I was reading it and decided they are telling a story that is BEFORE Lelouch's time. My idea comes from this,
1. They have swords.
2. There is someone called Anderous WEINBERG (hint Gino Weinberg)
3. No guns
4. Knightmares are like human/not
5. The girl who looks like Kaguya is Futabu
This is my opinion. So dont bash it.