The Demon and the Nerd
This is a light novel based on a cartoon (see at right; not my cartoon, the link is provided).
Basically, it's the whole story that fits in between the two "panels".
The demon is named Lilysera. She is a war demon who commands an army of demonic forces.
The nerd is named Tom Davis. He's a 30-year-old game company coder with a graduate degree in computer technology. He's also a sought-after, nationally-ranked GM for table-top gaming, due to his Strategic Vision skill (as assessed by Lilysera) topping out at Level 1000 (which is "more than even the Demon Lord has...last time I looked, he was only around 400"). He is, also by her assessment, a virgin (Amoureux "practically zero", Charisma "is 20? What woman would be interested?"). But his Cooking skill is level 500, which she finds amazing.
In the end, Tom agrees to teach Lilysera how to cook in exchange for her painting his 3,000 (or more) miniatures.
And I imagine there will be a romance spring up between them. She can shape-shift, so she can look like a normal human, so they can go out to restaurants and movies and, well, you know, date. She'll probably never get all of his miniatures painted...on purpose...because until she finishes them, she can't teleport back to her home universe, and the food and the company there, as she will find out, are not nearly as good as they are on Earth.
Status
In limbo, sitting at about 2400 words.