One common theme is the growth of their relationship. It often starts from a somewhat distant or one - sided view and develops into a deep and meaningful connection. Another theme is their combined strength in battles. Writers like to show how they complement each other in fighting against enemies.
Friendship is a very common theme. Since Naruto is known for his ability to make friends and Koneko has her own set of relationships, in fanfiction, they often form a strong bond of friendship that overcomes various obstacles.
It depends on different perspectives. From a purist point of view, it's likely to be seen as inappropriate because it may distort the original intention of the source material. But for those who view fanfiction as a space for unrestricted creativity, it could be seen as an interesting exploration. However, it should be noted that if the work is shared publicly, it may receive a lot of criticism due to the sensitive nature of the topic.
One great Issei and Koneko fanfiction is 'The Bond of Opposites'. It delves into their relationship in a really interesting way. It shows how Issei's brash nature and Koneko's quiet demeanor play off each other.
In a fanfiction, it could be that Koneko and Issei are chosen for a special mission by the Gremory group. They are initially hesitant to work together as they have different approaches. However, as the mission progresses, they start to complement each other's styles. Koneko's stealth and Issei's more upfront fighting style work in harmony to defeat the enemy and complete the mission, and in the process, their relationship grows.
In a fanfiction, Issei and Koneko could be paired for a school project. At first, they struggle to work together because of their different personalities. Issei is more outgoing and impulsive, while Koneko is quiet and reserved. But as they dig deeper into the project, they start to understand each other better and develop feelings for one another.
A simple plot could be that they compete in a school - wide tournament. Koneko's pride as a Nekoshou and Issei's determination to prove himself make for an interesting dynamic. They both face tough opponents and along the way, they offer each other advice and support, gradually becoming closer friends.
Lemon fanfictions are not really the kind of content that should be promoted widely. However, if you are looking for more general fanfictions about Issei and Koneko that are suitable for all audiences, you could join relevant fan groups on social media platforms and ask the members for their recommendations. They might be able to point you towards some great stories that focus on the relationship, character development, and adventures of Issei and Koneko without any inappropriate elements.
One common theme is family loyalty. The bond between Koneko and her brother is often explored deeply, showing how they would do anything for each other. For example, in many fanfictions, the brother will go to great lengths to protect Koneko from harm.
Adventure and battle themes are quite common too. Koneko is a part of the Highschool DxD world which is full of supernatural battles and adventures. Fanfictions might take her on new quests, or have her face stronger enemies, all while she tries to uphold her values and protect those she cares about. This can make for some really exciting and action - packed stories.
There could be consequences within the story itself as well. It might change the entire future arc of both Issei and Koneko in ways that are difficult to reconcile with the original character traits. For example, their relationship dynamics would be completely altered, and they would have to deal with the responsibilities of pregnancy, which could be a very different direction from what the original work intended. Additionally, other characters in the fanfiction might also be affected by this new development and their reactions could be hard to predict and write in a believable way.