Been getting kind of into Shinmota/Momoguji lately, I don't even know why, I'm not too into Kaito, but it's just something about his dynamic with Kiyo...
Thinking of a normal School AU where they're in P.E. class. Kaito knocks into Kiyo accidentally, causing him to get injured, (nothing too serious, maybe a twisted ankle or some nosebleed.)
Kiyo's aware it wasn't Kaito's intention and he isn't mad, but Kokichi keeps telling Kaito things like "Oooh, I'd be shitting my pants if I were you Momota, he's probably plotting to curse you!! I'm sure he's calling his ghost buddies later!!"
And Kaito is obviously annoyed and won't fall for his lies... Buuut he is conveniently nicer towards Kiyo throughout the week, holding open doors for him and offering to carry his books...