It's hard to name the 'best' as it's subjective. But some popular writers might be those who have a deep understanding of the characters. Writers who can accurately portray Aomine's laid - back yet intense nature and Kagami's hot - headed but determined personality tend to create engaging fanfictions.
One interesting plot could be Aomine and Kagami having to team up against a common, extremely powerful opponent. They start off bickering as usual but gradually learn to trust and complement each other's skills.
A possible scenario in this fanfic could be that the 'Lenon' times is a period of great change in the Kuroko no Basket world. Aomine, being a key player, is at the center of it. The reader might be a new addition to the basketball scene, perhaps a manager or a new player. Their relationship could start with Aomine being dismissive, but as the story progresses in this 'Lenon' times, they develop a deep bond that affects Aomine's performance on the court and his personal growth.
Yes, there are many. You can start by looking on fanfiction websites like Archive of Our Own or FanFiction.net. Just search for 'kuroko no basuke kagami x aomine' and you'll find a variety of stories written by different authors with different takes on their relationship.
A common theme is the evolution of their relationship. It starts with intense rivalry in the basketball context. Then, as the story progresses in fanfiction, it often turns into a more complex relationship. They might become friends, or there could be a sense of mutual admiration that goes beyond just being opponents. There could also be themes related to loyalty, as they might stand up for each other against other rivals or challenges in the fan - created stories.
Another theme is the exploration of their individual insecurities. In fanfiction, they might face their own weaknesses and how they overcome them with the help of each other. For example, Aomine's slump and Kagami's struggle to reach the top level can be a part of the story. Also, their shared passion for basketball is always a central theme. It's what brought them together in the first place and continues to be a major factor in their relationship in fanfiction.
One possible plot could be that the 'Lenon' times bring new challenges to the basketball teams. Aomine is struggling to adapt, and the reader, who has a unique perspective on the game, offers him advice. This leads to Aomine respecting the reader and a friendship forms.
One great 'Kuroko no Basuke Aomine x Kagami' fanfiction is 'Rivals to Friends'. It explores their relationship in a really interesting way, showing how their rivalry on the court can transform into a deeper understanding and friendship off the court.
The fanfics also tend to emphasize their individual personalities. Aomine's laid - back yet extremely talented nature and Kagami's fiery and determined attitude are often highlighted. These characteristics create interesting dynamics within the stories.
There's 'Aomine and Kagami: The Unseen Bond'. This fanfic focuses on how they gradually understand each other's motives and dreams. It's filled with emotional moments as they support each other through tough times in their basketball careers.