I really wanted to draw a fantasy AU so I schemed one up with @gloomsday.  There’s a larger story but basically Shiro is a literal paladin (because of course he is) and Keith is a scrappy warlock with a magic demon blade.  Keith is on the run from authorities and also from the paladins, who are not so stoked on a half-elf carrying around a powerful demon weapon.  Shiro is sent to chase him down and apprehend him, but things don’t go according to plan.