Another plotline could be a time - travel story where Naruto's girlfriend is from a different era. They have to navigate the differences in their cultures and times while also dealing with the threats that come with time - travel, like accidentally changing the future or facing enemies from different time periods.
In some fanfictions, the plot might focus on how Naruto's relationship with his girlfriend changes his view of the ninja world. Maybe he becomes more focused on building a future for them both rather than just achieving ninja greatness. It could also explore how his friends and the village react to their relationship.
A common plotline might be that the vampire girlfriend has special powers that Naruto needs to defeat a powerful enemy. For example, her ability to control blood could be used in a creative way in battle. Also, there could be a plotline where their relationship is forbidden because of her being a vampire and Naruto being a ninja, and they have to fight against the norms of their respective worlds to be together. This would involve them facing opposition from both the ninja community and any vampire clans that exist in the fanfiction.
Another plotline could involve Naruto using the Obito's Sharingan to unlock some hidden secrets about the Uchiha clan. He might discover something that even the remaining Uchiha members didn't know. With his unique ability to mix his Uzumaki chakra with the Sharingan's power, he could unearth ancient Uchiha techniques or prophecies. This could put him in a position where he has to protect this new knowledge from falling into the wrong hands, like those of the Akatsuki or other enemy ninja groups.
Another plotline could involve Naruto teaching his friends how to use or defend against the fox fire. This would not only strengthen their bonds but also show Naruto's growth as a leader and a more experienced ninja. He could hold special training sessions where they all learn to adapt to this new and powerful element.
One interesting plotline could be Naruto flinching during a crucial battle because of some psychological trauma from his past. Maybe he saw an enemy that reminded him of someone who had hurt him deeply before. This could lead to a struggle within himself to overcome that fear and regain his composure to win the battle.
Well, one plotline could be that the fox partner is actually a reincarnation of an ancient ninja spirit. In the fanfic, Naruto has to help the fox regain its full power while also using its power to defeat a new, powerful enemy threatening the Hidden Leaf. For example, they might have to journey to ancient ninja ruins to unlock the fox's true potential.
One possible plotline could be Naruto obtaining the power of Ryujin Jakka in a unique way. Maybe he discovers an ancient scroll that unlocks this power within him. Then he has to learn to control it, which could be a struggle as it's a very powerful and dangerous ability.
Often, there is a plotline about how Naruto's new bloodline affects his relationships. His friends may be in awe, some may be jealous, and his enemies will definitely be more interested in him. In some fanfictions, his new bloodline even causes rifts in his friendships at first as they struggle to understand this new side of him and the power he now wields.
One common plotline is the daughter inheriting Harry's magical abilities in a unique way. For example, she might be able to communicate with magical creatures on a deeper level than Harry ever could. Another plot could be about her facing a new dark threat at Hogwarts, using her father's fame both as an advantage and a burden. She could also go on a journey to discover a long - lost magical artifact that Harry was somehow connected to in his past adventures.
One interesting plotline is when Hermione's relationship with her boyfriend challenges the norms of the wizarding world. For example, if she's with a Muggle - born or a half - blood in a world that still has some prejudices. It can lead to stories about them fighting against discrimination together.
Some fanfictions may explore Naruto getting a girlfriend in a completely alternate universe. Maybe in a modern - day setting where Naruto is just an ordinary high school student and he meets a girl who has no idea about his ninja past, which leads to a very different kind of relationship.