Looking forward to it!
I'd love for you two to be in it ^^ I've seen some fight scenes, from Chuunibyou Demo Koi ga Shitai! Looks like a great show.
From what I've seen, the video could be you two fighting either each other or someone else, and every once in a while it switches between real life and what you are imagining. I don't know much about the show, so you two will probably have better ideas for the video than me :3
Does Rikka ever use any weapons/attacks besides the giant sword? That would be really hard for me to replicate with my limited knowledge of 3D modeling.
Also, I love your avatar
Aoki Lapis is one of my favorite Vocaloids!