I love this pairing, Misao and Aoshi, so much from Rurouni Kenshin (Samurai X) and so I've made up a story of their life after the events in Rurouni Kenshin. I think they deserve their own spinoff, not just about them, but their relationships and dynamics with the people around them, as well as their history when they first knew each other.
So the story concept is how Aoshi and Misao find their place as a couple at the end. I feel like the story mostly comes from Aoshi's POV when I end up finalizing the writing for it. Which should be okay, since Misao is a more straightforward character.