In some fanfictions, Kanda could be hurt as a result of a betrayal within the Order. A fellow exorcist, who has secretly turned against them, attacks Kanda. This could lead to a lot of internal conflict within the Order as they try to figure out who the traitor is and also take care of the injured Kanda.
A great idea could be that Kanda is hurt in a magical experiment gone wrong in the Black Order. It was an attempt to enhance his anti - Akuma weapon, but something backfires. This would not only physically harm him but also make him question his role and place in the Order. He might start to doubt if all their efforts are really worth it.
I really like 'The Unspoken Connection'. In this fanfic, the chemistry between Kanda and Allen is palpable. It starts with a simple mission they go on together and gradually builds up their relationship in a very believable way. It's a great read for fans of the pairing.
In D.Gray - Man fanfiction, Allen and Kanda often have a complex relationship. They are comrades in the fight against the Akuma, but their personalities clash. Kanda is hot - tempered and Allen is more gentle and kind - hearted. Their interactions range from bickering to grudging respect for each other's abilities.
One great place to find Kanda x Allen yaoi fanfiction could be Archive of Our Own (AO3). It has a large collection of fan - created works for D Gray - Man. Just search for the tags related to Kanda, Allen, and yaoi.
Another option is to check out D Gray - Man fan communities on social media platforms such as Reddit or Tumblr. Fans sometimes share their fanfics or know where to find specific ones. You could post a request asking if anyone knows of a Kanda tickle fanfic. However, make sure to follow the community rules when doing so.
One common theme is the exploration of their pasts. Both Allen and Kanda have troubled pasts that can be delved into in fanfiction. Another theme is their growth as characters, especially in relation to each other. For example, how they overcome their differences and become better comrades.
A really interesting plot could be that Kanda and Alma get stranded in a strange dimension during a mission. In this dimension, they have to rely on each other more than ever to survive and find their way back. Along the way, they start to understand each other's motives and fears better. For example, Alma's fear of being used again could be explored, and Kanda's loyalty to the Black Order could be put to the test.
The creativity in the scenarios is a big part. Maybe it's set in a situation where Kanda is caught off - guard and his reaction to being tickled is both funny and endearing. Also, the way the author describes the tickling itself, like the sensations and Kanda's responses, can add a lot of charm to the fanfic. It gives a different perspective on the characters and their interactions.
One common theme is the slow - burn relationship. Since Kanda has a rather cold exterior, many fanfictions explore how the reader gradually breaks through his barriers and they develop feelings for each other over time. Another theme is adventure. Given the nature of the D Gray - Man world, the reader and Kanda often go on dangerous missions together, which builds their bond.
The popularity lies in their contrasting personalities. Kanda is cold and stoic while Allen is warm and empathetic. This contrast creates a lot of potential for interesting relationship dynamics in fanfiction.