One possible plotline could be that Kagome accidentally ends up in the Naruto world through some sort of magic portal. Naruto then helps her find a way back home while they face various challenges together like dealing with rogue ninja or uncovering a conspiracy in the village.
Well, it could be that a powerful enemy threatens both the Naruto and Inuyasha universes. Naruto and Kagome are brought together by some sort of prophecy to defeat this enemy. They have to learn to trust each other quickly, combine their unique skills (Naruto's ninjutsu and Kagome's spiritual powers), and embark on a long and difficult journey to save both of their worlds.
A plotline might involve Naruto being sent to Kagome's world for a mission. There, he teams up with Kagome and her friends to fight demons. Along the way, Naruto discovers new powers within himself due to the different magic in Kagome's world. And of course, their friendship grows stronger throughout the adventure.