Perhaps there could be a plot where Naruto and Tenten discover a new form of training. They accidentally stumble upon a hidden area in the forest where the chakra flow is different. Together, they figure out how to use this new environment to enhance their skills. Naruto might learn some precision from Tenten while she could gain some of his tenacity when it comes to training.
Perhaps a story where Neji gets injured during a battle and Tenten takes it upon herself to nurse him back to health. During this time, they have long conversations about their dreams, fears, and past experiences. This shared time allows them to bond on a more emotional level, strengthening their relationship.
Well, they could embark on a journey to explore an ancient ninja ruin. Naruto, with his curiosity, would be eager to discover new things, and Tenten, being knowledgeable about ninja history related to weapons and artifacts, could guide them. Along the way, they'd face various challenges and grow closer as friends.
In a fanfiction, Naruto and Hinata as friends could go on a journey to find a rare flower that has the power to heal serious injuries. They encounter various obstacles like dangerous terrains and wild animals. Hinata might use her tracking skills with the Byakugan to find the right path, and Naruto would protect them from any immediate threats. As they travel, they talk about their dreams and fears, deepening their bond of friendship.
One plotline could be that they are on a long - term mission together in a foreign land. They have to rely on each other for survival, and during this time, they discover new sides of each other. Naruto's optimism in the face of danger starts to make Tenten see him in a romantic light, and Naruto is drawn to Tenten's strength and loyalty. Another could be that Tenten gets injured badly, and Naruto is the one who takes care of her. His care and concern during her recovery make her fall for him.
Well, their story could be full of adventures. They might train together in the Hidden Leaf Village. Tenten could show Naruto some of her weapon - using skills, and Naruto could share his dreams of becoming Hokage with her. They would support each other through the tough training days and also get into some small mischief around the village, like stealing some fresh - made dumplings from the local store and then running away giggling.
Maybe they meet when they are very young. Naruto, being an outcast in his village, and Rias, who might be facing some politics in her devil world. They bond over their shared feelings of loneliness and not being fully understood. As they grow up, they help each other out. For example, when Naruto has to face powerful enemies in the Chunin Exams, Rias could use her devil powers secretly to assist him without getting caught.
A really cool plot could be that Naruto and Kyuubi have to enter the minds of the villagers who once feared Kyuubi. They use their friendship as a tool to show the villagers that Kyuubi is not a mindless monster but a being with feelings and a capacity for good. They work together to change the perception of Kyuubi within the village, which helps to strengthen the bond between the village and Naruto even more.
One possible plotline could be how they deal with the politics of their respective villages. Since Naruto is from Konoha and Mei is from Kirigakure, their union might bring about a new era of peace and cooperation between the two villages. They could work together to strengthen their defenses and also share ninjutsu knowledge.
Maybe Naruto is on a mission to rescue someone who has been wrongly sent to the Underworld. Hades, at first, is resistant but Naruto's charm and pure heart make him change his mind. They become friends as they work together to find a way to return the person to the living world. Along the way, Naruto shows Hades the bonds of friendship that exist among his comrades in Konoha, and Hades begins to understand the power of such positive relationships.
One possible plot could be that Naruto, through some kind of magical or interdimensional rift, ends up in the realm of Hades. At first, Hades might be suspicious of Naruto, seeing him as an outsider. But Naruto's friendly and determined nature wins Hades over. They could team up to solve a problem in the underworld, like a rebellion among the souls or a threat from a powerful dark entity. Naruto's ninja skills would be put to the test in this strange new environment, and his ability to make friends would gradually change Hades' view of the living world.