No. Fanfics involving sexual content in this way are inappropriate and often violate ethical standards. Such content objectifies characters and can be considered a form of non - consensual exploitation in the context of fictional characters.
One negative impact is that it can make fans who love the original characters feel disgusted. These characters are often created with certain personalities and storylines in the original work, and sexualizing them in this way is disrespectful.
No. Writing fanfic with sexual content involving characters from Naruto is inappropriate and goes against the ethics of the fan community. Naruto is a popular anime mainly aimed at a wide range of audiences including children and teenagers. Such inappropriate content violates the spirit of the original work.
One plot idea could be that Kushina and Danzo have to work together to protect the village from a powerful outside threat. They start off distrusting each other, but as they face challenges, they gradually learn to respect and rely on one another.
There are many fanfiction platforms where you can search for such works. For example, FanFiction.net. You can simply type in 'Kushina and Danzo' in the search bar and then carefully browse through the results to find the ones that are not of the 'lemon' type.
One great topic for Naruto fanfic is exploring the backstories of secondary characters more deeply. For instance, we could learn more about the training and early days of Kakashi or Iruka. Also, fanfic could be about how the village of Konoha develops over time, with new buildings, alliances, and challenges. Additionally, writing about the daily lives of the ninja in a humorous way, like their attempts at cooking or dealing with pranks, is a great alternative.
One possible motive could be revenge. Maybe the oc or someone close to the oc has been wronged by Danzo in the past. So, to seek justice, the oc decides to take him down.
It could also be due to Naruto's outcast status in the village initially. Danzo might think that banishing Naruto would be an easy decision as Naruto doesn't have many supporters at first. He might believe that by getting rid of Naruto, he can maintain the status quo in the village and prevent any disruptions that Naruto's presence might cause in the future.
There's a fanfic where Danzo tries to manipulate Naruto for his own political gain. However, Naruto, being the perceptive character he is, quickly catches on. This leads to a battle of wits between them. In the end, Naruto uses his own brand of talk - no - jutsu to make Danzo see the error of his ways and they end up working together to reform the village's political system.
In a fanfic where Danzo gives Naruto the Sharingan, it could lead to a very different Naruto. Naruto might gain new abilities and a new perspective on the Uchiha. He could potentially master the Sharingan quickly with his strong willpower, but he would also have to deal with the dark side of the Sharingan, like the curse of hatred that often comes with it.