A great fanfic would also have an engaging plot. It could be a mystery where they have to solve a case together related to the assassination classroom world. Or it could be a story of redemption where one of them has made a mistake in the past and the other helps them make amends. This would add depth to their relationship and make the story more interesting.
One possible plot could be that Irina and Karasuma are forced to work on a top - secret mission together outside of the classroom assassination context. Maybe they have to infiltrate an enemy organization where Irina uses her charm skills and Karasuma his combat and strategic abilities. They start off bickering as usual but gradually develop a deeper understanding and respect for each other during the course of the mission.
There could be a fanfiction where Irina has to go on a secret mission alone, but the students of Class E find out and decide to help her in their own sneaky ways. This would show the bond between her and the students in a different light.
Asking in Assassination Classroom fan communities on social media platforms can also be a great way. There are often groups dedicated to sharing and discussing fanfiction. Members might be able to recommend some really good ones about Irina.
The 'Assassination Classroom' is about a powerful octopus - like creature that destroys a large part of the moon and threatens to do the same to Earth. He becomes a teacher of a class of misfit students. The students are tasked with assassinating him within a year. As the story progresses, the students grow both in their assassination skills and as individuals. They form bonds with their strange teacher, who also teaches them valuable academic and life lessons.
One of the main science fiction elements in 'Assassination Classroom' is the character of Koro - sensei. He is an octopus - like being with extraordinary powers, which is a very imaginative and science - fictional concept.