Another idea is a 'what - if' scenario. What if Zero had been more open with Kaname from the start? Their relationship could have developed in a very different direction. They might have been able to work together more effectively against common enemies, like the Pureblood vampires who pose a threat to both of them and the school.
One plot idea could be a pre - story exploration of their relationship. Maybe show how they first met in a more detailed way than in the original work. For example, it could be a chance encounter during a dangerous vampire - hunter situation where they initially mistrust each other but then gradually realize they have a connection.
A really engaging plot could be a time - travel story. Zero goes back in time and meets a younger Kaname. This changes the course of events in the Vampire Knight universe as Zero tries to prevent some of the tragedies that happened, and in the process, he and the younger Kaname form a unique bond that is different from their relationship in the original timeline. There could be a lot of drama as Zero has to deal with the knowledge of what will happen if he fails, and Kaname has to figure out who this strange hunter from the future is.
One plot idea could be exploring Zero's inner struggle with his vampire nature in a more in - depth way while Kaname is trying to protect him from the darker aspects of the vampire world. Maybe Kaname discovers a way to temporarily suppress Zero's thirst for blood, but it has unforeseen consequences on Zero's emotions and relationships.
A plot could be Yuki and Kaname getting lost in a magical forest. In this forest, they discover secrets about their past that they never knew before. This could strengthen their relationship as they share these new revelations.
Well, a plot could center around a time - travel aspect. Imagine if a character from the present in Vampire Knight Zero accidentally travels back to a crucial point in the vampire - human history. They could then change some events that have a ripple effect on the current story. Or, a fanfiction could be about a secret society within the vampire world that has been hidden from the main characters. This society could have its own rules and goals that conflict with what the protagonists believe. Additionally, a story about a curse that affects not only vampires but also humans in a unique way could be really engaging.
One great fanfic idea could be that Kaname and Zero are forced to team up to fight a new threat in the Vampire Knight world. They start off hating each other as always, but as they face challenges together, they gradually begin to understand each other better.
In Vampire Knight fanfiction involving Kaname and Zero, there could be various interpretations. One could be a story where their relationship evolves in a world full of vampire politics. They might have to face challenges together against the traditional vampire hierarchy that disapproves of their bond. This could lead to them growing closer and perhaps having a deeper connection that goes beyond the ordinary friendship or rivalry shown in the original series.
One idea could be exploring Kaname's past further. Maybe a story where he meets an old acquaintance from before he became a vampire. This could bring out new aspects of his character, like his hidden fears or long - lost hopes.
One interesting plot idea could be that Kain and Zero are forced to team up to fight a new, powerful enemy that threatens the vampire - human coexistence in their world. This would put their differences aside and make them learn about each other's strengths and weaknesses.
Another plot could involve a time - travel scenario where Yuki goes back in time to before Zero became a vampire hunter. She tries to change the events that led to his current situation, but it gets complicated as it might affect the entire Vampire Knight world order. This could lead to a series of adventures where they have to face both old and new enemies.
One plot idea could be that Zero's 'death' is not really permanent. He could be in a state between life and death, and Yuki has to go on a journey to bring him back fully. Maybe she has to make a deal with some powerful vampire entity who has the ability to revive Zero.