The baby could be the child of a fallen ninja. Maybe the ninja was an ally of Naruto's and before dying, entrusted Naruto with the baby. This would add an emotional depth to the story as Naruto would feel a great sense of responsibility to raise the baby well.
Well, in such a fanfic, the plot might involve Naruto finding a baby in a difficult situation, like maybe the baby was orphaned after a battle. Naruto, being the kind - hearted hero he is, decides to take the baby in. He'd then have to learn how to take care of a baby while still handling his ninja duties. He might ask his friends like Sakura for advice on baby - care, and the story could also show how the baby grows up influenced by Naruto's values and the ninja world around it.
The child could be an orphan from a small, destroyed village that Naruto comes across during one of his missions. This child might have lost their family to a powerful enemy and Naruto feels a sense of responsibility to take them in.
Well, one possible plot could be that Naruto discovers an orphaned baby during one of his missions. He decides to take the baby in because he understands what it's like to grow up without parents. He then has to learn how to take care of a baby while still being a ninja. Maybe he gets help from his friends like Sakura who gives him medical advice for the baby's health, and Kakashi who gives him some wisdom on raising a child.
Some of the more traditional ninja elders might oppose Naruto's decision. They could think that Naruto, as a busy ninja, doesn't have the time to take proper care of a baby. They might be worried that it could affect his performance in important missions.
One possible plot could be Sasuke finding Naruto as a baby, perhaps after some great disaster in the village. Sasuke, having changed his views, decides to take Naruto under his wing. He then has to deal with the challenges of raising a child while also facing the judgment of the village.
Protection is also a big theme. Naruto is always protecting Sasuke in these stories, whether from external threats or from Sasuke's own inner demons. It's like Naruto is a shield for Sasuke. And friendship is there too. Even though Naruto is in a father - like role, the essence of their friendship from the original story is still there, just in a different form.
Well, it could be that Itachi sees the potential in baby Naruto and decides to protect him from the dark forces in the ninja world. Maybe Itachi wants to raise Naruto to be a powerful and kind - hearted ninja, away from the hatred that plagues their village.
One possible plot could be that Kurenai, seeing Naruto as a lonely and neglected baby, decides to take him in. She could then start teaching him basic ninja skills from a very young age. Naruto would grow up with a mother - like figure in Kurenai, which would change his personality in some ways. He might be more confident and less of a prankster as he has the love and support he needs early on.
The story could also focus on how Kakashi's decision to adopt Naruto affects the village's perception of Naruto. People might start to see Naruto in a different light, not just as the Jinchuriki but as Kakashi's son. This could lead to Naruto having a more positive experience growing up in the village, with less ostracism. Kakashi would have to navigate the politics of the village while also raising Naruto, which could add a lot of interesting twists to the plot.