Well, in a 'Kakashi x Iruka tickle fanfic', it's interesting because it combines two beloved characters in a new and unexpected way. The tickle element can be used to create humorous situations. For example, if Kakashi, who is usually so serious, gets caught up in a tickle fight with Iruka. It also allows for exploring their personalities more deeply in a non - traditional, fun context.
Kakashi and Iruka could start off with some initial tension. Iruka might be a bit wary of Kakashi's unorthodox teaching methods as he's more traditional. But as they work together with Naruto, they would start to understand each other better. Kakashi would share his combat experiences with Iruka, and Iruka would share his insights on Naruto's emotional state. Naruto would be the bridge between them, bringing out the best in both.
One possible plot could be a training adventure. Naruto, Kakashi, and Iruka could go on a special mission to train Naruto further. Kakashi might teach Naruto some new and advanced ninja techniques, while Iruka could offer moral support and his own knowledge of basic ninja skills. They could face a new and dangerous enemy, and through their combined efforts, Naruto could learn important lessons about teamwork and self - improvement.
One possible antagonist could be the Akatsuki members. They are always looking for strong opponents or valuable information. Maybe they target Iruka because they think he has some knowledge about Naruto that they can use, and Kakashi has to stop them.
In such a fanfiction, perhaps Kakashi might save Iruka from a dangerous enemy like Orochimaru's minions. Kakashi, with his Sharingan and powerful jutsu, could arrive just in time to fend off the attackers.
One possible plot could be that Kakashi and Iruka notice Naruto's loneliness more acutely than in the original story. They decide to formally adopt him. Kakashi might train Naruto more intensively in his own unique ways, while Iruka helps Naruto with his schoolwork and emotional growth. Naruto would then grow up with a stronger support system and become even more confident and powerful at a faster rate.
I'm not sure of a specific 'Kakashi x Iruka tickle fanfic' off the top of my head. But you can try searching on fanfiction websites like Archive of Our Own. They usually have a large collection of fan - made stories, and you might be able to find what you're looking for by using the relevant tags and keywords.
Perhaps a plotline where Kakashi and Iruka have to protect Naruto from the Akatsuki. They train Naruto intensively to prepare him for any potential attacks. At the same time, they try to keep Naruto's identity as the Jinchuriki of the Nine - Tails a secret from the Akatsuki members who are after his power.
They are a popular pairing because they have a pre - existing relationship in the Naruto series. They are both important figures in the lives of the young ninjas. Kakashi is a respected and skilled jounin, and Iruka is a caring teacher. Their different personalities complement each other well. Kakashi is more reserved and mysterious, while Iruka is warm and open. This contrast makes for interesting storylines in fanfiction.
One possible plotline could be Iruka and Kakashi trying to teach Naruto different ninja skills in their own unique ways. For example, Kakashi might focus on more advanced combat techniques while Iruka helps Naruto with the basic ninja knowledge. Another plotline could be them dealing with Naruto's pranks and how they discipline him in a loving yet firm manner. Maybe they also have to protect Naruto from some of the more dangerous elements in the ninja world that target him because of his status as the Jinchuriki.