Well, perhaps the plot could involve Izuku suddenly growing ears and a tail due to some sort of experiment gone wrong. He then has to deal with the new appendages while trying to keep it a secret from his friends and teachers at U.A. High. Maybe he discovers new abilities that come with these changes, like enhanced senses.
The plot could be that Izuku wakes up one day with ears and a tail. At first, he's really confused and scared. As he tries to figure out what happened, he realizes that these new features are related to an ancient power that has been dormant in his family for generations. He then embarks on a journey to learn how to control this new power and use it for good, all while facing challenges from villains who want to take this power for themselves.
One possible plot could be that Naruto discovers a new jutsu or is under a curse that causes him to grow fox ears and a tail. This new form might make his friends initially confused or even a bit scared. But as the story progresses, he learns to control this new part of himself and uses it to his advantage in battles, like having enhanced senses from the ears and better balance with the tail.
In this fanfiction, Izuku's character development could be quite complex. Initially, he would struggle with the physical changes, like learning how to control his tail movement and deal with the extra sensitivity of his new ears. Emotionally, he would face a lot of inner turmoil. But as he starts to explore the potential of his new form, he could become more confident. He might also develop new relationships with characters who are attracted to his unique form, which could further shape his character into someone who is more open - minded and less shy than he was before.
One possible reason could be a strange side - effect of his connection with the Nine - Tails. Since he has the Nine - Tails' chakra within him, in the fanfiction world, this chakra might start to physically manifest in the form of fox ears and a tail during his time in Wave. Maybe the unique environment or a specific event in Wave triggered this abnormal transformation.
A lot of these fanfictions deal with the idea of uniqueness. Izuku's ears and tail make him stand out even more in a school full of students with amazing quirks. It's about how he uses this uniqueness to his advantage in battles and daily life. For example, in some stories, his ears give him enhanced hearing for detecting villains. And his tail can be used for quick maneuvers or to communicate non - verbally with his friends in certain situations.
Well, perhaps Percy is a character in a magical world. He could have been cursed or exposed to some strange magic that causes him to grow a tail. Maybe it starts as a small, furry growth that he tries to hide, but as the story progresses, the tail takes on a life of its own and gives him unique abilities like climbing better or sensing danger.
One possible plot could be that Naruto's new tail gives him unique abilities related to balance and agility, like a real fox. He might have to learn to control it at first, causing some comical situations in the Hidden Leaf Village. Maybe he could use it as an extra limb in battle, grabbing kunai or shuriken that he couldn't reach otherwise.
Maybe there's a magic spell gone wrong in Paris, and Marinette is the only one affected in this unique way. She then has to deal with the attention she gets, both positive and negative, from her classmates. Chat Noir might be intrigued and offer to help her understand her new feline side, leading to some cute and comical interactions.
The fanfiction 'Ears and Tail of a Hero' is also quite good. It delves into the origin of Izuku getting ears and a tail, perhaps as a strange mutation of his original quirk. It has a great plot that keeps you engaged from start to finish.
One possible plot could be that Ash wakes up one day to find he has Pikachu ears and a tail. He initially panics but then realizes he can use these new features to better understand Pikachu. For example, he discovers he can sense electricity in a similar way to Pikachu, which helps them in battles. His friends are both shocked and amused at first, but they soon see the advantages.
The plot could involve a dark magic spell gone wrong. Harry gets cursed with cat ears and a tail. He then has to find a way to reverse it while dealing with the strange new sensations and the reactions of his friends. Some might find it hilarious, while others might be worried about him.