Perhaps Naruto leaves to find a way to heal the deep scars left by the war, both on the land and in the hearts of the people. He travels to remote areas, meeting hermits or sages who have unique knowledge. Along the way, he discovers new chakra techniques that could potentially be used to bring more peace and stability to the ninja world. He also reflects on his own journey and how far he has come, and this self - discovery helps him grow even more as a ninja and a person.
One possible plot could be that Naruto, feeling a sense of restlessness after the war, decides to leave the village to explore the world and learn more about the ninja arts from different places. He might encounter old enemies who have changed their ways or new threats that the villages are not yet aware of.
One possibility is that Sirius, having finally been vindicated and after the chaos of the war, decides to travel the wizarding world to heal. He might visit old friends and places from his youth that he couldn't before due to his false imprisonment. He could be on a journey of self - discovery, trying to find his place in a world that has changed so much.
One possible plot could be that Naruto is exiled because some people fear his power after the war. He then travels to different lands, meets new allies and discovers hidden secrets about his family or the ninja world. Maybe he also starts to train in new and unique ways to become even stronger while in exile.
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.
One possible plot could be that Naruto and Mei work together to rebuild the villages. Naruto, with his experience and leadership, helps Mei in restructuring Kirigakure. They might face challenges like distrust among villagers due to past hostilities, but Naruto's charm and Mei's determination help them overcome. For example, they could organize joint training sessions between Konoha and Kirigakure shinobi to promote unity.
One possible plot could be that the other villages fear Naruto's power after the war. They put pressure on the Hidden Leaf to banish him. Naruto, feeling betrayed, leaves but then starts to discover new powers or allies in his exile as he tries to prove his worth and find a way back home.
In a 'naruto after the war harem fanfiction', the plot might involve Naruto being the hero of the war and now many female ninjas are attracted to him. Some of them could be from different villages. They start to compete for his attention while Naruto is focused on peace - building, creating a complex web of relationships.
Perhaps he leaves to explore the Muggle world. Harry has always had an interest in Muggles. After the war, he realizes he wants to experience life without magic for a while. He could go to university in a big city like London, study a Muggle subject like history or literature. He'd make new Muggle friends and try to fit in, all while still having his magical abilities hidden, which would add an interesting dynamic to his new life.
Naruto could encounter wandering ninjas who have their own stories and reasons for not being part of a village. Some might be outcasts due to their beliefs or powers, and Naruto's interaction with them could lead to either conflict or new friendships. He may also come across some of the shinobi who fought on the opposite side during the war but now have different outlooks on life. Through these meetings, Naruto gets a broader perspective on the ninja world.
Maybe Naruto leaves to Suna because he has some personal issues in Konoha. He could be seeking a fresh start in Suna. There, he might meet new friends and foes alike. He could get involved in Suna's internal politics or power struggles while trying to prove himself as a valuable ally.
In such a fanfiction, Naruto might leave his village in anger and sadness. He could go on a journey of self - discovery, trying to come to terms with the betrayal. Maybe he'd meet new allies who help him grow stronger and more independent.