A plot could revolve around Lucy getting lost in a magical forest that Sting is familiar with. Sting finds her and decides to help her get out. Along the way, they discover an ancient magic relic that has the power to either bring great good or great evil. They have to work together to figure out what to do with it. During this time, they learn more about each other's pasts and dreams, which deepens their bond.
One plot idea could be Sting and Lucy teaming up for a really difficult S - class mission. They start off not getting along well because of their different guilds' rivalries in the past. But as they face various challenges during the mission, like powerful dark mages and dangerous terrains, they gradually come to respect and care for each other. Eventually, they complete the mission successfully and form a strong friendship that could potentially turn into something more.
Maybe a fanfic where Sting and Lucy are both chosen to participate in a magic tournament. In the tournament, they keep seeing each other's skills and determination. Sting is attracted by Lucy's unique celestial spirit magic, and Lucy is impressed by Sting's power. They end up being allies in the tournament against some really unfair and strong opponents. This shared experience brings them closer together.
One idea could be that Sting and Lucy are on a joint mission. They get lost in an ancient, magical forest. As they struggle to find their way out, they start to share their deepest fears and dreams, which brings them closer. Another could be a story where Lucy is in danger and Sting has to fight off a powerful dark guild to save her, and during this, he realizes his true feelings for her.
One idea could be that they go on an adventure together to find a lost magical artifact. Along the way, they discover new things about each other and their relationship deepens.
Well, a plot could revolve around Sting being overly protective of Lucy during her pregnancy. He might try to keep her from going on any dangerous missions, which could lead to some cute arguments between them. Then there's the idea of them preparing a nursery together. They could have different ideas about how it should look, like Sting wanting it to be all about Sabertooth's colors and Lucy having a more whimsical design in mind. And of course, there could be a plot where they discover that their baby has some special magic abilities even before it's born.
One plot idea could be that Lucy and Sting discover they are pregnant around the same time. They could then support each other through the various challenges of pregnancy in a magical world. Maybe they have to deal with magical side - effects on their unborn children due to their own powerful magic.
One possibility is that it's a fanfic set in an alternate universe where Sting has a special connection with Lucy. They might discover a new form of magic together. For example, Sting's white dragon slayer magic could combine with Lucy's celestial spirit magic in an unexpected way, leading to a whole new set of adventures.
There could be many different fanfictions with Lucy and Sting having a pregnancy plot. However, it really depends on the creativity of the fanfiction writer. Some might write it as a way to develop their relationship further, perhaps adding more drama and complexity to their story.
One idea could be a time - travel plot where Lucy, Rogue, and Sting are sent back in time to the founding of Fairy Tail. They have to navigate the early days of the guild while also trying to find a way back to their own time. Another could be a magic - swapping scenario, where they accidentally exchange their magical abilities and have to learn to use each other's magic to fight a new, powerful enemy.
One plot idea could be that a magic spell goes wrong and Lucy ends up pregnant. Natsu is initially shocked but then quickly embraces the idea of being a father. They then have to deal with the guild's reactions, some of which are positive and some negative.
Writing fanfic involving sexual content about real people is inappropriate and unethical. It violates their privacy and can be considered a form of harassment.
I'm not sure if there is a specific 'lucy x sting' fanfic rated M. You could try searching on popular fanfic websites, but make sure to follow their terms and conditions.