One possible story could be about Kankuro and Sakura teaming up on a mission. In the fanfiction, they start off as just comrades but gradually develop a deeper understanding and friendship. This friendship might then be the base for some interesting character - growth arcs for both of them, like Sakura teaching Kankuro some medical ninjutsu basics in return for him showing her some of his puppet - making secrets.
You can start by looking on some popular fanfiction websites like FanFiction.net or Archive of Our Own. They have a large collection of Naruto - related fanfictions, and you might be able to find some that feature Kankuro and Sakura. Just use the search function on the site and type in 'Kankuro and Sakura' to narrow down the results.
One idea could be that Sakura uses her medical ninjutsu to heal Kankuro after he gets seriously injured in a battle against a powerful enemy. She has to overcome various challenges like limited supplies and the unique nature of Kankuro's puppet - related injuries.
A plot twist could be that the method Sakura uses to heal Kankuro has an unexpected side effect. For example, it gives him a temporary boost in his puppet - using abilities that he has to quickly learn to control.
A possible fanfiction could be set in a post - war scenario. Kankuro and Sakura are part of a group that is trying to rebuild relations between their respective villages. They often have debates on how to best achieve this. Along the way, they also discover that they have more in common than they thought, which leads to a deeper connection between them.
Maybe there's a plot where Kankuro and Sakura are both chosen to participate in a special ninja tournament. They train together before the tournament, learning from each other's techniques. During the tournament, they support each other and their friendship blossoms as they progress through the various rounds.
One common theme is friendship. Writers often explore how these two characters from different villages can become friends. For example, they might start off as rivals but then find common ground in their love for their respective villages and the shinobi way.
I'm not sure specifically about 'lemon' fanfiction (which often implies inappropriate or adult - themed content). However, there are many great fanfictions about Kankuro and Temari that focus on their sibling relationship, their growth in the Naruto universe, and their interactions with other characters. You can try looking on popular fanfiction websites like FanFiction.net or Archive of Our Own and search for their relationship without the 'lemon' aspect.
I'm not sure specifically about 'gaara and kankuro lemon fanfiction'. Fanfiction can vary greatly in quality and availability. You could try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net. However, make sure to abide by their terms and conditions.
One way to discover great temari and kankuro fanfiction (even if it's not specifically 'lemon') is to follow some Naruto fanfiction groups on social media platforms. Members often post about new and interesting stories they've come across. You can also ask in those groups if anyone has any recommendations for temari and kankuro - centered fanfiction. Just be aware that not everyone might be into that pairing, so you might need to dig a bit deeper.