Perhaps a plot where an enemy targets Hinata to get to Naruto and the demon fox within him. Naruto then has to go on a journey to rescue her, all the while facing his inner demons, literally. Along the way, they could discover new things about their relationship and their own powers.
A really interesting plot could be that the demon fox's chakra starts to affect Hinata in some way. Maybe it gives her new powers or abilities. Naruto has to figure out how to deal with this situation, whether to try and stop it or let it happen, while also dealing with the reactions of the village who are scared of any changes to Hinata related to the demon fox.
Well, a plot could involve a young fox demon who is trying to find its place in the Naruto universe. It might start out as a mischievous character, causing small troubles in the Hidden Leaf Village. But as the story progresses, it discovers a connection to an ancient prophecy related to Naruto. This could lead to them teaming up and using the fox demon's unique powers, such as shape - shifting and illusions, to overcome challenges. Maybe the fox demon has a tragic backstory that Naruto helps it come to terms with, forging a deep bond between them.
One idea could be that Demon Naruto has to protect Hinata from dark forces in the ninja world. Since he has demon powers, he has unique abilities to fend off threats. Another could be that Hinata's gentle nature starts to tame the demon within Naruto, leading to a transformation in his power and personality. Maybe there could also be a plot where they go on a journey together to find a way to fully control Naruto's demon side without losing his humanity, and during this journey, they fall deeper in love as they face various challenges.
A cool plot could be that the entire village is under a dark spell, and only Hinata realizes that the demon king Naruto is the key to breaking it. So she embarks on a journey with him, facing various obstacles and enemies along the way, and during this journey, their relationship deepens.
Another plot could be that Hinata, as a bunny, discovers Naruto's fox form by accident. At first, she's a bit scared but then realizes Naruto is still the same kind - hearted person. They then start a journey to discover the secrets of Naruto's fox heritage and along the way, they face challenges like a group of hunters who are after Naruto. Through their adventures, their bond grows stronger.
A third plot idea is that there is a festival in the village that only those with animal forms can participate in. Naruto and Hinata enter as a team. They have to compete in various games and tasks. During this time, Naruto realizes his true feelings for Hinata as he sees how kind and strong she is, even in her bunny form.
Perhaps there could be a crossover of the chakra system in Naruto and the spiritual energy in the fox demon world. A fox demon tries to learn chakra control and combines it with their own powers. This would create a whole new set of jutsu - like abilities. For example, they could create a fire - based attack using their fox demon fire and chakra to make it even more powerful.
A plot where the demon fox lord, instead of being a purely malevolent force, has his own code of ethics. He might decide to help Naruto train in a very unorthodox way, pushing him to his limits and beyond. This could be a story of growth not just for Naruto, but also for the demon fox lord as they interact in ways that no one expected.
One idea could be exploring how Naruto further masters the power of the Demon Fox Cloak in a different way. Maybe he discovers a new form of the cloak that has unique abilities. For example, a form that allows him to phase through solid objects while in the cloak state. Another idea is to write a story where the Demon Fox Cloak has a mind of its own and tries to take over Naruto during a crucial battle, leading to an internal struggle within Naruto.
One idea could be exploring how Naruto's half - demon fox nature affects his relationships differently. For example, some friends might be more fearful or in awe of his power. Another could be a story where Naruto has to go on a journey to fully understand and control his half - demon fox side without the help of his usual mentors, relying only on his own instincts and new, unexpected allies he meets along the way.
One idea could be Naruto, as a kitsune, having to protect Hinata from an ancient evil that targets her because of her special Byakugan powers. The kitsune powers of Naruto could add an interesting twist to the battles and their relationship.