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.
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.
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.
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.
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.
One interesting thing is how their personalities might be explored in fanfiction. Kankuro is often seen as a bit of a trickster, while Tenten is determined. Their different traits could lead to some engaging storylines, like Tenten trying to get Kankuro to take things more seriously, or Kankuro teaching Tenten to be more flexible in her thinking.
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.
One interesting plotline could be Kankuro falling in love with a foreign ninja. Their different cultures create a lot of misunderstandings at first, but as they train together and face challenges, they gradually fall for each other. For example, she might not understand the significance of his puppet - making skills at first, but as she sees how it helps in battles, she begins to respect and admire him more.
One great piece of Sakura Kankuro fanfiction might be 'The Unlikely Bond'. It focuses on their friendship development in an AU (alternate universe) where they are both on a mission together. They start off not getting along but gradually learn to respect and rely on each other.
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.
One interesting sakura fanfiction could be about a magical sakura tree that grants wishes. In this story, a young girl discovers the tree and her life changes as she makes wishes that come true in unexpected ways.