Well, you could write about a quest to find all the pages of the Book of End. The main characters might face various challenges and enemies along the way. They could encounter new magical creatures that are somehow related to the book. Also, a plot where the Book of End's power is misused by a villain, and the Fairy Tail guild has to stop the chaos it causes. This could involve epic battles and lots of character development as they struggle against this new threat.
One idea could be exploring the origin of the Book of End in more depth. Maybe it has a connection to an ancient civilization in the Fairy Tail universe. Another could be a story where a character is possessed by the power of the Book of End and their friends have to save them. Or perhaps a tale of how the Book of End was created and the intentions behind it.
Well, a plot idea could involve the end bride being a long - lost princess of a magical kingdom. The Fairy Tail members discover this and have to protect her from those who want to use her for their own gain. As she gets closer to becoming the end bride, she discovers her true powers and uses them to save the guild. Also, perhaps she's an amnesiac and as she falls in love with a Fairy Tail member, her memories start to return and they are related to her role as the end bride.
A cool concept for a 'Fairy Tail End' fanfiction would be to have a time - travel plot. The characters could go back in time to prevent a great tragedy that was hinted at in the original series. This would involve them interacting with their younger selves and changing the course of history in the Fairy Tail world. It would also be interesting to see how they deal with the knowledge they have from the future.
One idea could be to explore the backstory of a minor character in 'Fairy Tail Book 1'. For example, you could write about how a particular guild member joined the guild. Another idea is to create an alternate timeline where a key event in the book didn't happen or happened differently, like if Natsu didn't find Happy. You could also focus on a relationship, such as the friendship between Lucy and Erza, and show how it developed further through new adventures not in the original book.
One idea could be a new character arriving at Fairy Hills and having to adapt to the unique living situation. They could face challenges like getting along with the different personalities of the Fairy Tail mages living there.
Another plot could involve Bardock having to adapt to the magic - based society of Fairy Tail. He might initially struggle with understanding how magic works, but then discovers a way to combine his Saiyan power with the magic there. For example, he could learn to use ki - based attacks in harmony with Fairy Tail's elemental magics. This would create a unique fighting style that surprises both his allies and enemies.
One idea could be a crossover adventure where characters from Fairy Tail and Negima team up to fight a common, powerful enemy. For example, they might face a dark wizard who has the ability to steal magic from both worlds.
One idea could be that the main couple from Fairy Tail goes on a honeymoon to a magical island. There, they discover a hidden ancient magic that they have to protect from villains who also find out about it. Another plot could involve them facing relationship challenges during the honeymoon, like misunderstandings due to magic gone wrong. For example, a spell makes one of them forget parts of their relationship, and they have to work through it to rekindle their love.
In a 'Fairy Tail WW2 Fanfiction', a possible plot could be that the guild discovers a hidden magical dimension that is somehow connected to the events of WW2. They enter this dimension to try and stop a dark force that is influencing the war from the shadows. Some of the characters could form alliances with real - life military personnel who are open - minded enough to accept their help. This would lead to interesting interactions between the magical and non - magical worlds during the war.
One idea could be exploring how the next generation of Fairy Tail wizards handle a new dark guild threat. They might have to combine the old and new magic techniques they've learned.
One idea could be that Luffy joins the Fairy Tail guild and his rubber powers amaze everyone. He might participate in a guild - wide competition and use his unique abilities to win in unexpected ways. For example, stretching to reach far - off targets or bouncing around the arena to dodge attacks.