Well, it could be that Natsu's snap makes him question his own strength and purpose. He might think that if he had been stronger, he could have saved Lucy. So, he embarks on a journey to become even more powerful. Along the way, he meets some characters who either try to stop him from his self - destructive path or join him in his quest for revenge. His relationship with the other guild members would also be severely strained as he's in such a dark place after Lucy's death.
I'm not entirely sure as I haven't read it specifically. But generally, a fanfiction about 'natsu' might be based on a character named Natsu from a particular series. It could involve his adventures, relationships, or some unique situations that the author has created within the framework of the original story or in a new, imaginative world.
It could be about a misunderstanding. Maybe Natsu is under a lot of stress or has been wrongly accused, and Erza's actions or words accidentally trigger his outburst.
Obviously, Natsu and Erza are the main characters. Natsu is known for his hot - headed and impulsive nature, which could lead to him snapping. Erza, on the other hand, is often strong - willed and in a position of authority, which might be a contributing factor to Natsu's reaction towards her.
There are several places to search for 'natsu snaps fanfiction'. Besides the big fanfiction platforms like FanFiction.net and AO3, you could also try searching on Tumblr. There are often fanfiction recs (recommendations) on Tumblr blogs related to the fandom. Another option is to simply use a search engine like Google. Type in 'natsu snaps fanfiction' and see what comes up. But be cautious when clicking on links from search engines as some sites might not be reliable or safe.
They can develop their relationship by having small, everyday moments. For example, sharing breakfast together as a family, where they talk about their plans for the day. Natsu could show his love for Lucy by being more protective of her and their family in dangerous situations. Also, they could have inside jokes that only their family understands, which would strengthen their bond.
One character that would be interesting to include is Mirajane. She has a motherly and observant nature. She could be the one to nudge Natsu and Lucy in the right direction when it comes to their relationship. For instance, she might arrange for them to go on a mission together that she knows will bring them closer. Laxus could also be in the fanfiction. His powerful presence can create a sense of danger or protection. If there's an outside threat to the guild while Natsu and Lucy are exploring their relationship, Laxus could be at the forefront of defending the guild, which would impact Natsu and Lucy's situation. And don't forget about Cana. She could be the one to create some light - hearted chaos, like daring Natsu and Lucy to do something that ends up bringing them closer, such as a bet that leads to a shared adventure.
As they travel, their bond deepens. They start to rely on each other more. Natsu becomes more protective of Lucy, and Lucy begins to understand Natsu's impulsive nature better.