One possible plot could be that Natsu and Erza leave Fairy Tail due to some kind of internal conflict within the guild. Maybe there are differences in opinions regarding how the guild should be run or what kind of jobs they should take. So they decide to set out on their own journey to find a new purpose.
It could be a group of rogue mages who have a vendetta against Natsu and Erza. They see the two leaving Fairy Tail as an opportunity to attack them when they are more vulnerable outside the protection of the guild.
One great aspect of Natsu and Erza fanfiction is the exploration of their unique friendship. In many stories, their different personalities - Natsu's brashness and Erza's strictness - create interesting dynamics. For example, there are fictions where they team up for a mission and Natsu's unorthodox methods initially clash with Erza's by - the - book approach, but eventually they learn to work together better, leading to a stronger bond between them.
Gray would be shocked at first. He and Natsu have a long - standing rivalry - but also a deep friendship. He might initially be angry that Natsu would just leave like that, but then he would realize how much he'll miss him. He might also feel a sense of loss for the guild as a whole, since Natsu is such an important part of it.
There's a fanfiction titled 'Unexpected Affection'. In this one, the kiss between Natsu and Erza occurs during a moment of high drama. It's set during a dangerous battle where they both think they might not survive. This situation leads to a very passionate and unexpected kiss that changes their relationship dynamics in the story.
Yes, there are quite a few. You can find some on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Fairy Tail Natsu and Erza romance' and you'll get a bunch of results. Some might focus on how their relationship could develop in different scenarios, like during a particularly tough battle where they realize their feelings for each other.
I really like 'The Unlikely Alliance' which is a great Natsu Erza Mira fanfiction. It shows how they can put aside their differences and work together against a common threat. The author does a wonderful job of writing their interactions, especially the banter between Natsu and Erza.
One great fanfic could be 'The Adventure of Natsu and Erza'. It focuses on their unique bond during a dangerous mission. They rely on each other's strengths and in the process, their relationship deepens in a very platonic yet heartwarming way.
In fanfiction, a child of Natsu and Erza might inherit Natsu's fiery temper and love for adventure. They could also have Erza's strong sense of justice and discipline. Maybe they'd have Natsu's pink hair and Erza's beautiful eyes. And they'd probably be a powerful mage, combining Natsu's dragon slayer magic with Erza's requip magic.
The way it fits into the 'Fairy Tail' universe. If the fanfiction can incorporate the magic, the guild's dynamics, and the overall world - building of 'Fairy Tail' while still focusing on Natsu and Erza's relationship, it becomes really interesting. For example, a fanfiction where the kiss is a result of a magical bond or a quest that they undertake together within the Fairy Tail world.