If you're cruising through AO3 looking for KamiKiss fic, the first thing you'll notice is how many writers latch onto that initial reluctant caretaker vibe. That grumpy/sunshine dynamic gets stretched in every direction—I've seen a ton of fics where Nanami's shrine duties force Tomoe into modern human situations he absolutely despises, like figuring out smartphones or dealing with convenience store food. The evolution often hinges on peeling back his layers of arrogance to show a softer side, but without making him out of character.
A surprising trend I'm into is role-reversal AUs. Instead of the land-god/mortal setup, you get human college student Tomoe and maybe a more spiritually powerful Nanami. It flips the power dynamic on its head and lets writers explore their chemistry without the formal servant-master barrier. The best ones keep Tomoe's fierce protectiveness and Nanami's stubborn kindness intact, just in a new context. Makes you realize their core dynamic is pretty flexible.
Honestly, the weakest fics for me are the ones that skip straight to domestic fluff without earning it. Their relationship in the manga is a slow, prickly burn—fanfics that mirror that tension, where Tomoe's centuries of loneliness and distrust actually mean something, always hit harder. I drop a kudos every time I find one where Nanami's optimism feels like a genuine effort, not just a cute personality trait.