Maybe a story where Sakura learns swordsmanship from Kirito while Naruto and Asuna exchange combat techniques. Sakura has always been interested in improving her skills, and Kirito is an expert swordsman. At the same time, Naruto's unique combat style could give Asuna some new ideas. They could then participate in a big tournament in a new world created by a mysterious force, which combines elements of both their universes.
One interesting storyline could be a crossover where Naruto and Sakura are transported to the world of Kirito and Asuna. They could team up with Kirito and Asuna to fight against a common enemy that combines the threats from both their worlds, like a powerful demon that has the ability to hack into the virtual world. This would lead to some really cool fight scenes with Naruto's ninjutsu, Sakura's strength, and Kirito and Asuna's sword skills all coming into play.
In a combined fight, Naruto might have an edge in terms of raw power. His Rasengan and other ninjutsu can cause massive destruction. However, Kirito's ability to quickly analyze his opponents and adapt his fighting style in the virtual world is not to be underestimated. Sakura could provide support with her medical skills and also hold her own in combat. Asuna's speed and precision with the sword could also be a game - changer. So, it really depends on how they team up and what strategies they use.
Maybe the wedding is a secret affair at first. Kirito and Asuna decide to elope and have a small, private ceremony in a beautiful, secluded location within the game. They could face some challenges during the planning, like dealing with in - game enemies who try to disrupt the event. And then later, they surprise their friends with the news.
One interesting storyline could be Sakura joining the Anbu and having to prove herself among the male - dominated group. She might face challenges like secrecy requirements and intense training, all while Naruto is on his own journey, and their paths cross in unexpected ways during missions.
Another storyline could be a time - travel fanfiction. Sakura somehow travels back in time and meets a young Itachi. She tries to prevent the Uchiha massacre by working with Itachi. In this process, she might also learn more about the Uchiha clan and their secrets, which she can later use to help Naruto in their present - day battles.
Another storyline could revolve around a promise they made as children that they forgot over time. As they grow older and face different challenges, something triggers their memory of that promise. It could be a place or an item. Then they have to figure out what the promise meant and how it still holds significance in their current relationship, whether it's a promise of friendship or something more.
One popular kirito and asuna fanfiction is 'A New Adventure'. It takes place after the events of the main series and has them exploring a new, mysterious virtual world together. Another is 'Asuna's Dream', which delves into Asuna's dreams and how Kirito is intertwined within them.
Kirito and Asuna might first try to close the distance quickly. Since Naruto is a ninja and has long - range attacks like his Rasengan and various ninjutsu, they need to get in close to nullify his ranged advantage. Kirito could use his speed and dual - wielding to keep Naruto distracted while Asuna looks for an opening to strike a decisive blow.
Another storyline could be a training - arc - like fanfiction. Maybe Naruto wants to teach Hinata and Sakura a new jutsu he learned. Hinata might struggle a bit more because of her gentle nature compared to Sakura's more assertive learning style. They could all learn from each other's strengths and weaknesses during this training, which would also strengthen their bonds as friends and comrades.
Well, they could have a baby that is a sort of bridge between the real world and the virtual world. In the fanfiction, the baby might be able to bring elements from the virtual world into the real world in a harmless but amazing way. For example, virtual flowers could start growing in their real - world garden. But this also causes some problems as some people in the real world start to get jealous or scared. Kirito and Asuna then have to deal with these real - world issues while also raising their baby in both worlds.
One popular kirito and asuna fanfiction might be 'A New Adventure for Kirito and Asuna'. It could explore their relationship in a new virtual world setting, with them facing new challenges together and deepening their bond. Another could be 'Kirito and Asuna's Secret Date' which focuses on their more private and romantic moments outside of the main battles.