A possible plot could be that there is a magical tournament. Natsu and Cana enter as a team. They have to compete against other powerful pairs. Along the way, they discover a hidden conspiracy within the tournament. As they dig deeper, their bond strengthens. Natsu's fiery nature and Cana's card - based magic complement each other in different ways during the battles. They also meet some old friends and foes during the tournament which adds more flavor to the story.
One plot idea could be that Natsu and Cana go on a special mission together. During this mission, they face various challenges that force them to rely on each other more than ever. As they overcome these difficulties, their friendship deepens and they start to realize new feelings for each other. Another idea is that in a magical accident, Natsu and Cana end up swapping powers for a while. This leads to humorous situations as they try to figure out how to use the other's abilities. They also have to work together to reverse the spell, which brings them closer.
Perhaps a plot where Cana loses her memory due to a dark magic attack. Natsu is determined to help her get her memory back. He takes her to all the places they used to go together. As he does this, he tells her stories about their adventures. Slowly, Cana starts to regain fragments of her memory. During this process, Natsu realizes how much she means to him and Cana, even without all her memories, feels a strong connection to Natsu.
Maybe a magical spell goes wrong and makes them see their relationship from a different perspective. They start to notice all the little things they like about each other, like Natsu's determination and Cana's free - spiritedness, which leads to them falling in love.
One idea could be that they discover their pregnancy during an important mission. This would add a layer of complexity as they have to balance their new situation with their duties. They might have to face the reactions of their friends in the guild, some being overjoyed and others worried. Another plot could involve them preparing for the baby's arrival, like Natsu trying to build a nursery with his unique brand of enthusiasm but making comical mistakes along the way.
One plot idea could be that they accidentally find out about the pregnancy. Natsu, being his usual impulsive self, is at first shocked but then becomes extremely protective. Cana, on the other hand, is a bit more hesitant as she's not sure how to handle this new situation while still being part of the guild. They could face challenges like dealing with the guild's reactions, some of which might be positive and some negative. And they have to prepare for the arrival of the baby together, which includes finding a proper place to live and getting the necessary supplies.
Well, one possible plot could be that they are on a dangerous mission together. In the heat of the moment, as they face a powerful enemy, they realize their deep feelings for each other and share a kiss. It could be a moment of both passion and a new beginning in their relationship.
One possible plot could be that Natsu realizes his deep feelings for Cana over time. They might go on an adventure together where Natsu protects Cana from a powerful enemy. This shared experience makes them closer and Natsu decides to propose. Their wedding could be a grand affair with all their friends from the guild celebrating.
Perhaps a plot where Ultear uses her time - related magic to go back in time and meet a younger Natsu. She initially has an ulterior motive but ends up falling for him. Their relationship develops in a series of flashbacks and present - day interactions, with a lot of emotional and some mildly romantic undertones, but without crossing into inappropriate territory.
One idea could be a story where Natsu and Erza Knightwalker are on a mission together in a strange land. They face numerous challenges that force them to rely on each other more and more, leading to a deepening of their relationship. Their different personalities, Natsu's impulsiveness and Erza Knightwalker's more stoic nature, could create some really engaging character dynamics.
Well, a great plot could be that Cana discovers Kid has a hidden talent for divination, which is her specialty. So she decides to train him in it. Along the way, they face challenges from other guilds who don't want Fairy Tail to have such a powerful divination duo. They have to work together to overcome these obstacles and prove their worth.
One plot idea could be Bacchus and Cana teaming up for a drinking competition that turns into a magical adventure. As they drink, they start to unlock hidden magical powers within themselves that they didn't know they had. Another idea is a story where Bacchus helps Cana overcome her insecurities about her magic. He could use his own experiences to guide her and in the process, they develop a deep friendship. Or perhaps a plot where they are both on a quest to find a rare magical item that has a connection to their families' pasts.
In the 'natsu gets cana pregnant fanfiction', perhaps it starts with a magical accident. Natsu and Cana might be exposed to some strange magic that causes an unforeseen bond between them. As a result, Cana discovers she is pregnant. Then, they would have to face the reactions of their friends and the challenges that come with this new situation in their lives.