In the 'harry just wants to be alone fanfiction', it could be that Harry has seen the toll the wizarding wars have taken on everyone around him. He feels guilty for being a part of it all, even if it wasn't his choice. So, he decides to be alone. He travels to a far - off magical island where he lives in solitude. He spends his days meditating, trying to come to terms with his past. He might also be trying to figure out a way to prevent future disasters in the wizarding world without having to be in the spotlight all the time.
Well, perhaps in this fanfiction, Harry has had enough of the constant battles and drama. He just wants a break from his friends too, not because he doesn't love them, but he needs time for himself. He could find an abandoned cottage and start a simple life there, growing his own magical plants and spending his days reading ancient magic texts that he never had time for before. He's basically trying to find peace away from all the chaos.
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.
The main antagonist could be an internal one - Harry's own guilt. It's like a dark shadow that follows him everywhere. He wants to be alone to escape from it, but it keeps haunting him. It makes him question his every move and decision, and it's this internal struggle that could be seen as the main 'antagonist' in the fanfiction as it constantly opposes his desire for peace and solitude.
There's a possibility that the main antagonist is an internal force within Naruto himself. His desire to be alone could be a manifestation of some dark part of his psyche. This 'inner antagonist' could be trying to make Naruto cut himself off from his loved ones completely, leading him down a path of self - destruction. And Naruto has to fight this internal battle while also dealing with any external threats that come his way during his isolation.
It could be someone from the village who doesn't understand Naruto's need for solitude. Maybe a council member who thinks Naruto is shirking his duties and tries to force him back into the spotlight.
Maybe he's frustrated with all the prophecies and his role in the fight against Voldemort. He doesn't want to be constantly pushed into being the hero. He might want some time to figure out who he really is outside of all these expectations. Also, he could be feeling a bit overwhelmed with his studies and the extra - curricular activities like being in Dumbledore's Army. All these things together make him long for some solitude.
In a 'Harry Fights Alone' fanfiction, the plot could involve Harry being betrayed by his friends. Maybe they are put under a spell that makes them turn against him. Harry then has to face the dark forces all by himself. He might have to rely on his own wits and the few spells he has mastered alone. For example, he could be in a situation where he has to battle Voldemort's minions without Ron and Hermione to back him up, and he discovers new powers within himself during this struggle.
In this fanfiction, Harry could be in a post - war scenario where he is longing for a new beginning. The idea of having a baby could represent hope and a fresh start for him. He might face opposition from some of his friends who think he's too young or not ready, but he is determined to make it happen. He starts learning about how to take care of a baby in the wizarding world, which is quite different from the Muggle world.
The plot might involve Harry trying to figure out how he got pregnant in the first place if it's in a world where male pregnancy is not the norm. He could be alone because he doesn't want to burden his friends or family. Harry would then have to learn about pregnancy on his own, from reading books or searching the internet. He might also face financial difficulties as he prepares for the baby's arrival, but through his own determination and some unexpected help, he starts to build a new life for himself and the baby.
One possible plot could be that after some time away, Harry has gained new skills or knowledge. Britain is facing a great threat, perhaps a magical one if it's in a wizarding world context. The people realize that Harry is the key to solving the problem, so they try to convince him to come back. They might send his old friends to persuade him, and he has to decide between his new life and his old homeland that now needs him.