Well, it could be about Naruto using his singing as a way to communicate with demons. Maybe his unique voice has some sort of power over them, like it can soothe the more violent ones or even make them do his bidding.
Perhaps in this fanfiction, Naruto discovers that he has an ancestral connection to demons through his singing. His family might have had a hidden past where singing was used to either keep demons at bay or call upon them for help. So as he starts to sing, he unknowingly awakens certain demon powers or attracts demons to him.
One possible plot could be that Naruto discovers a strange power within him that makes him sing in a way that can calm the inner demons of the people around him. For example, he might use this newfound ability during a battle to soothe the anger and hatred in his enemies, turning them into allies.
Well, it could be a really wild plot. Maybe Harry discovers he has the ability to use his magic to make demons sing, and he uses this as a way to defeat Voldemort. For example, the demons' singing could have some kind of magical effect that paralyzes the dark forces.
One possible plot could be that Naruto decides to sing to Sakura to confess his love. He might choose a beautiful, secluded spot like the top of Hokage Rock. He sings a song that he has written himself, pouring all his unspoken feelings into the lyrics. Sakura is initially shocked but then starts to really listen and understand Naruto's deep emotions for her.
Maybe Naruto sings hero fanfiction to cheer up his friends who are feeling down. His singing could be about the heroic deeds of past shinobi, inspiring his friends to be brave.
One possible plot could be that Naruto is in a situation where his village is on the brink of a major conflict. As he sings 'This is War', his voice somehow empowers the villagers, giving them the courage to face the approaching enemy. The lyrics of the song might inspire them to fight for their freedom and way of life.
One possible plot for 'naruto sings in the end fanfiction' is that Naruto discovers a new power within himself related to music. He sings to harness this power and uses it to further strengthen the bonds between the different clans in the village. His singing could attract the attention of other villages as well, leading to a new era of cultural exchange and cooperation among the ninja world.
One possible plot could be that Naruto and Kakashi enter a singing competition in the Hidden Leaf Village. Naruto, with his energetic personality, might choose a loud and inspiring song, while Kakashi could pick a more mellow, soulful tune. They face various challenges during the competition, like dealing with tough competitors and stage fright.
The main antagonist could be a demon who is threatened by Naruto's singing ability. This demon might be using people's inner demons to gain power, and Naruto's singing that calms those demons is ruining its plans.
Well, it could be about Naruto using his singing as a form of jutsu. Maybe his singing of 'We are One' has the power to unite the people in the Hidden Leaf Village during a time of crisis, like when they're facing a powerful enemy. The lyrics might inspire the villagers to come together and fight as one.
One possible plot could be Naruto using the song as a form of inspiration during a tough battle. Maybe he's facing an enemy that seems unbeatable, and the lyrics of 'I Will Not Bow' give him the mental strength to keep fighting. He might start singing it quietly to himself at first, and as his resolve grows, his voice gets louder, inspiring his comrades as well.