An interesting way to explore this in a fanfic would be to have Naruto's wing - sprouting be a result of a forbidden jutsu gone wrong. He has to deal with the consequences, like being hunted by those who fear the power of the wings. Meanwhile, he discovers that the wings also give him the ability to sense danger from afar. As he tries to control the wings and avoid being caught, he also has to protect his friends, making for a thrilling story.
The fanfic could start with Naruto having a strange dream about flying. Then, during a mission, he suddenly sprouts wings. It would be interesting if the wings had unique properties, like being able to change color depending on his mood. For example, when he's angry, they turn red and he becomes more powerful. This would add an element of mystery and excitement to the story.