Maybe Naruto is alone because all his friends are with their families. He might be reminiscing about his past Christmases, or perhaps he's on a mission during Christmas and feels a bit lonely while seeing the festive cheer around him.
It could be that Naruto has some unresolved feelings during Christmas. He might be thinking about his parents who he never really got to have Christmas with. Since he's alone, he could be exploring the village by himself, seeing how others celebrate, and feeling a sense of longing for a proper family Christmas.
One possible plot could be Naruto reflecting on his past Christmases. Maybe he remembers all the times he was alone while others were with their families. He could then decide to go on a self - discovery journey around the village on Christmas day, seeing how others celebrate and finally realizing that he has his own kind of family in his friends, even if they are not physically with him at that moment.
It could be about Naruto choosing a solitary life after all the battles. Maybe he decides to live alone in the forest to find inner peace away from the chaos of the ninja world.
In a 'naruto fights alone fanfiction', it could be that Naruto is on a mission in a foreign land where he has no support. The local ninjas are all against him for some reason. He has to use his Nine - Tails chakra in a more discreet way as he can't afford to go all - out and draw too much attention. He might befriend some local animals or spirits who help him in a more indirect way, like giving him information about the enemies' weaknesses.
Maybe in this fanfiction, Naruto is alone after the war because the villagers still don't fully trust him despite his heroic deeds. He then embarks on a journey to find a new purpose, away from the village that he once fought so hard to protect. Along the way, he discovers new powers within himself and also meets some unlikely allies who help him come to terms with his situation.
In this kind of fanfiction, one possible plot could be that Naruto loses all his friends due to some unforeseen and tragic events. Maybe he makes a great sacrifice to save the village, but in the process, he becomes estranged from everyone. His friends might misunderstand his actions, or he could be cursed in a way that drives people away. Eventually, he dies alone, with his heroic deeds forgotten by most.
Well, it could be about Naruto being constantly pestered by someone, like a villager who doesn't trust him because of the Nine - Tails inside him. So he just wants to be left alone to train and prove himself. He might go off to some secluded place in the forest to practice his jutsu without any distractions.
Maybe Naruto has had enough of the chaos in the ninja world. He could be tired of all the battles and political intrigue. So, he decides to find a secluded place, perhaps a small island, where he can live in peace and train by himself without any distractions.
In this fanfiction, Naruto may find himself in a situation where he's being hounded by people for various reasons - some for help, some for his power. He simply wants to be left alone to live a normal life. So he might start to avoid the village and the people in it, seeking refuge in a secluded place. There, he could explore his own thoughts and feelings more deeply, perhaps even learning new skills or abilities on his own, away from the watchful eyes of his friends and the village.
One possible plot could be that Naruto and Anko are assigned to do some Christmas - related mission in the Hidden Leaf Village. They might have to deliver presents to the orphaned ninja kids. Along the way, Naruto's positive attitude starts to rub off on Anko, who is usually a bit more cynical. They share some funny moments as Naruto tries to speed up the process by using his shadow clones, but they end up making a bit of a mess. In the end, they successfully complete the mission and enjoy a small Christmas celebration together with the kids, with Anko realizing the true spirit of Christmas through Naruto's kindness.
Well, it might show Naruto in a modern setting, all alone, perhaps because he's the only one with his unique abilities. He could be constantly on the run from people who want to study or use him. And as he's alone, he'd have to learn to rely on himself in ways he never had to in the Naruto universe. He'd also likely have internal struggles as he misses his old friends and life.