The fanfiction might explore how Naruto, coming from a world of ninjas, would raise Shippo in a world that is a mix of both ninja and demon elements. Maybe Naruto would train Shippo not only in his demon powers but also in ninja arts like stealth and combat strategies. It could also show how their relationship develops over time, with Naruto being a protective and wise father figure, and Shippo looking up to Naruto and learning from him. There could be emotional moments as well, like when Shippo faces difficulties and Naruto is there to support him, just like a real father - son relationship.
It could be a story full of adventure. Naruto's ninja skills and Shippo's demon abilities would make for a powerful duo. They could go on quests together, fighting against various villains.