One idea could be that Naruto uses his infinite chakra to instantly master all the jutsus in the ninja world. He could then teach others, changing the power dynamics in the Hidden Villages.
Well, in such a fanfiction, Naruto might start to experiment with new and extremely powerful jutsus that were previously impossible due to chakra limitations. He could also use his infinite chakra to help rebuild and improve the Hidden Leaf Village at a much faster rate. For example, he could power large - scale construction projects or provide continuous chakra for defense mechanisms. This would change the balance of power not only in the Leaf but also among the other hidden villages.
It could be a jealous ninja from another village who sees Naruto's infinite chakra as a threat to their own village's power. This ninja might try to steal Naruto's chakra source or find a way to nullify it.
I'm not entirely sure as there could be many different 'infinite chakra web novels'. Generally, it might be about characters with infinite chakra, which could lead to extraordinary powers and adventures in a fictional world.
One interesting plot twist could be that Naruto's infinite chakra attracts the attention of powerful, ancient entities who want to either control or destroy him because they see his power as a threat. Another could be that Naruto's friends start to feel inferior and jealous of his unlimited power, causing a rift in their relationships.
Naruto would likely become more confident. With infinite chakra, he would no longer have the insecurities related to running out of chakra during battles. This new - found power could also make him a bit more reckless at times, as he might think he can handle any situation without consequences.
Well, with infinite chakra, Naruto can spam his powerful jutsus without getting tired. For example, he could keep using Rasengan continuously. This would make him almost unbeatable in battles, changing the power dynamics in the story completely.
One consequence could be that he becomes extremely powerful. His physical abilities like strength, speed, and endurance are enhanced. He can also use more powerful jutsus with the extra chakra boost from the Kyuubi.
One interesting way is when Naruto absorbs chakra through his shadow clones. In some fanfictions, the clones can be used not just to gather information or attack, but also to absorb the chakra of the opponents they interact with. Then, they transfer this absorbed chakra back to Naruto, making him more powerful.
The consequence might also be a shift in the balance of power in the Naruto universe. With all that chakra, Naruto could potentially change the political situation. He could end wars single - handedly or force the different ninja villages to re - evaluate their strategies. Moreover, his own physical and mental state might be affected. There could be a struggle within him to keep his identity intact while dealing with such an overwhelming power source.