What are some interesting plot ideas for 'natsu x lucy family fanfiction'?

A great plot could involve Natsu and Lucy adopting a child with no magic. They would teach the child how to be strong in other ways and how to face challenges without relying on magic. The family could then get involved in a mystery that is related to the child's past. As they dig deeper, they discover secrets that not only help the child understand their origins but also put the whole family in danger. It would be a story about family, love, and facing the unknown.

One idea could be that Natsu and Lucy face challenges in their guild duties while being pregnant. They might have to balance protecting the guild and their unborn child. For example, they could go on a mission that seems easy at first but turns out to be more dangerous due to Lucy's condition, and Natsu has to be extra cautious to protect her.

One idea could be that Natsu and Mirajane start a family in a peaceful post - guild - war era. Their kids inherit unique magical abilities from both of them and they have to train and guide their children through the magical world's challenges.

A plot idea could be that an old enemy from Natsu's past returns and targets Lucy to get to Natsu. Natsu then has to go all out to protect Lucy, and in the process, they both learn more about each other's fears and insecurities. Or perhaps there is a magical competition in which Lucy and Natsu team up, and they face various challenges that test not only their magical abilities but also their friendship and trust in each other.

Maybe the guild holds a special event where everyone has to swap roles, and Lucy ends up as a maid. Natsu, being his usual self, follows her around, getting into all sorts of comical situations as he tries to help her with her maid duties. For example, he might accidentally set something on fire while she's trying to clean, and they have to work together to fix it.

One idea could be that Natsu and Lucy accidentally end up taking care of a baby dragon. Natsu would be excited to teach it fire - breathing tricks while Lucy would be more focused on keeping it safe and fed. Another plot could involve a magic spell gone wrong that turns them into babies themselves, and they have to figure out how to reverse it while in this state. It could also be a story where they find a lost baby in the forest during one of their quests, and they decide to raise it together, which would show their growth as characters in terms of responsibility.

A fun plot could be that a magical creature gets into the shower with them. It's a small, mischievous thing that likes warm water. Natsu tries to catch it while Lucy tries to calm it down, leading to a lot of chaos and laughter.

Well, a plot could involve a new student arriving at Fairy Tail Academy who seems to have a connection to Natsu's past. Lucy gets a bit jealous at first, thinking there's more to it. As they all interact, they end up in a magical competition within the academy where they have to team up to face tough opponents. This not only tests their magical powers but also their friendship and loyalty to each other.

Well, perhaps they are transported to a parallel world where they are already the Dragon King and Queen. But this world is in chaos due to an evil dragon's reign. Natsu and Lucy have to figure out how to use their newfound status and powers to defeat the evil dragon and restore peace. They might also meet alternate versions of their friends who have different roles in this world.

One idea could be that End and Lucy are from different worlds. End is from a dark, magical realm and Lucy is from a more normal human world. They accidentally cross paths when a portal opens between their worlds. End is initially seen as a threat but as they interact, they start to understand each other and form an unlikely alliance against a common enemy that wants to destroy both of their worlds.