What are some interesting plot ideas for an 'assassination classroom harem fanfic'?

A plot could revolve around a time - travel aspect. A student accidentally travels back in time to before Koro - sensei was experimented on and tries to change the course of events. This would involve a lot of moral dilemmas as they might be changing the future for better or worse.

One plot idea could be Itona's struggle to fully adapt to the classroom environment. He could start off as an outsider but gradually form deep bonds with his classmates. Maybe he discovers a new hobby or talent that helps him fit in better, like joining a music club in the school within the Assassination Classroom world.

Well, perhaps a group of students time travel to a future where they see the consequences of not assassinating Koro - sensei in time. This could give them new motivation and strategies when they return to their own time. Or, what if Koro - sensei time travels to different points in the students' lives and helps them in ways that are not related to assassination, like helping a student deal with a family issue in the past.

One idea could be the children of the original students having to face a new threat in the classroom. Maybe a relative of Koro - sensei who has a different teaching style but also a hidden, dangerous side.

One idea could be a new student arriving at Paradise High with a special ability that both helps and complicates the assassination attempts on Koro - sensei. For example, they might be able to sense his weak points more acutely but also have a personal vendetta against the students trying to kill him.

Another idea is a time - travel fanfic. Nagisa and Karma are sent back in time to when they first met. They remember all the things they've been through together in the future. This time, they decide to change some small things in their past interactions. They start to encourage each other more from the very beginning. Karma helps Nagisa to be more confident in his abilities, and Nagisa shows Karma the importance of thinking things through carefully. This changes the whole dynamic of their relationship in the present when they return to their original time.

One plot idea could be Okuda developing a new type of anti - Koro - sensei formula that has unexpected side effects. Maybe it makes her able to understand Koro - sensei's language in a deeper way, leading to some comical yet heartwarming interactions between them as she tries to communicate with him privately about the students' progress. Another could be a story where Okuda has to team up with a rival classmate who initially doubts her skills, but as they work together on a project related to Koro - sensei, they learn to respect each other and Okuda shows her true genius.

One idea could be that Karma and Nagisa have to team up for a special mission outside of school. They face a group of powerful opponents and have to rely on each other's unique skills. Karma's bold and aggressive style combined with Nagisa's stealth and surprise attacks would make for an exciting adventure.

Well, you could write a fanfiction where the students develop new and unique assassination techniques. It could also be interesting to write about a time - travel plot, where a student goes back in time to change something that would affect the whole assassination classroom scenario. Or perhaps a story that focuses on the relationship between Koro - sensei and a particular student, like Nagisa, and how it develops in unexpected ways.

One interesting plot could be a gamer who gets transported into the Assassination Classroom world and uses their gaming skills to outwit the students in assassination attempts. For example, they might use strategic thinking from real - time strategy games.