In a fanfiction where Naruto becomes a monster, it could start with Naruto being possessed by an ancient evil spirit. This spirit warps his mind and body. Naruto, in his monstrous state, might have enhanced powers but at the cost of his humanity. His journey could involve trying to break free from the spirit's control. He might have to face his friends in battle as they don't recognize him and think he's a danger. He could also discover new aspects of his ninja way as he battles his inner demon.
Well, perhaps Naruto is experimented on by a rogue group. They use some forbidden techniques on him that mess with his chakra system and start turning him into a monster. His struggle would then be about trying to fight this transformation while also dealing with the fact that people are starting to fear him. He could try to find a cure on his own or with the help of a few loyal friends.
A possible plot could be that Naruto is given a special mission that no one else in the village can handle. This mission involves infiltrating a powerful and secretive organization. Along the way, he discovers new powers within himself, like a hidden kekkei genkai related to his Uzumaki blood. He uses these new powers to complete the mission successfully and is then promoted to Jounin for his extraordinary efforts.
Perhaps Naruto meets a Sadaiam character who has a really kind heart and strong sense of justice, much like himself. This person shows Naruto the beauty of Sadaiam art, music, or philosophy. Naruto, being the open - minded person he is, gets immediately drawn to it. He might then start promoting Sadaiam values among his friends in Konoha, which could cause some interesting cultural exchanges and a few conflicts too as not everyone might be as receptive.
Well, it could be about Naruto having to adapt to the unique world of Monster Musume. Maybe he discovers some new powers related to the Monster Musume world. For example, he might learn to communicate with the different monster species in ways he couldn't before. He could also form alliances with some of the Monster Musume characters to face common enemies from both the Naruto universe and the Monster Musume world.
In this fanfiction, Naruto might go to Monster High to seek some kind of special power or knowledge. He could make friends with the monster students, like Frankie Stein. Together they could face challenges like a bad guy who wants to disrupt the harmony between ninjas and monsters. Naruto would use his Rasengan while Frankie uses her electricity powers to fight the enemy.
In the fanfiction, perhaps Naruto meets the monster girl during his travels. She could have unique abilities that Naruto has never seen before. Their meeting could lead to a series of adventures where Naruto learns about her culture and way of life. This could also be a chance for Naruto to grow as a person, learning to accept differences and finding new ways to use his own skills in cooperation with the monster girl.
It could start with a strange phenomenon in the ninja world. Naruto and Hinata are in the wrong place at the wrong time and get caught up in it. As they become Hanyou, they discover that they can now communicate with certain spirits or demons. This new ability leads them to an ancient prophecy. They then have to figure out what the prophecy means and how it relates to their new forms. Their relationship also deepens as they rely on each other more in this new and dangerous situation.
One possible plot could be Naruto having to prove himself to the village elders. He might start by implementing new training programs for the younger ninjas, inspired by his own journey. He could also focus on improving relations with other villages, using his charisma and unique perspective as someone who was once an outcast.
One possible plot twist could be that Naruto has to face an unexpected opponent during the Chunin Exams. Maybe a rogue ninja infiltrates the exam and targets Naruto specifically because of his Nine - Tails power. Another twist could be that the rules of the Chunin Exams are suddenly changed in the middle, forcing Naruto to adapt quickly. For example, they might add a team - vs - team battle where Naruto has to work with his former rivals.
A possible plot could be that Naruto and Sasuke are sent on a diplomatic mission to another village. Along the way, they face many challenges like harsh weather and bandit attacks. Naruto's ability to stay positive and Sasuke's combat skills help them survive. During their journey, they have deep conversations about their dreams and fears. This new understanding of each other makes them realize they have more in common than they thought, leading to friendship.
Well, it could be that Naruto discovers this song during a mission in the modern world. Maybe he starts singing it to cheer up his comrades when they're feeling down. The lyrics might resonate with his own struggles against the Nine - Tails inside him, like how the song talks about inner demons.