A fanfiction story could start with Naruto being in a desperate situation where he feels that the normal path to peace is not working. So, he decides to team up with Obito and Madara. At first, they seem to be working towards a common goal. But then, Naruto realizes that their means are too extreme. For example, he discovers that the Infinite Tsukuyomi they plan would take away people's free will. He then has to find a way to stop them while still maintaining some sort of alliance. This could lead to a complex web of relationships and power struggles within the group.
One common theme is power and ambition. Both Madara and Obito are characters with great power and strong ambitions in the Naruto series, and fanfics often explore how their relationship is influenced by these aspects.
The theme of redemption also appears. Given some of the actions of Obito and Madara in the Naruto series, fanfics sometimes explore if they can find redemption in their relationship with each other. They might try to make up for their past mistakes through their connection in the fanfic.
A third option is 'The Alliance of Obito and Madara'. In this one, the author focuses on their combined power and how they could have ruled the ninja world together. It's full of action scenes and also has some deep emotional moments between the two characters.
In such a fanfiction, the story could take a very dark turn. Naruto's ideals of friendship and peace might be severely tested. He could be forced to question his own beliefs as Obito and Madara have very different outlooks. Maybe Naruto would try to change their minds, but it would be extremely difficult as they are both very set in their ways of achieving a new world order through more extreme means.
Naruto in Madara's armor would look like a blend of his own energetic self and Madara's dark and powerful aura. The armor might be a bit big on him at first, but as he gets used to it, he would carry it with confidence. His orange jumpsuit peeking out from under the armor in some places would add a unique touch to his overall look.
Fanfiction.net is also a good place to look for madara x obito fanfic. There are many different stories written by fans from all over the world. However, the quality may vary, so you might need to read the summaries and reviews before choosing one.
Qin Guan was caught in the rain when he moved south to Chenzhou. He had an old servant, Teng Gui, with him. The old servant had been with Qin Guan for a long time, following him to the south. Qin Guan stayed by the roadside because the muddy road was impassable. After a while, Qin Guan arrived with a walking stick." Scholar! Scholar!" Teng Gui exclaimed. They obtained wealth and became good officials. This land was not in vain. Why should I accompany them?" He didn't mention the details of Qin Guan's old servant when he moved south to Chenzhou.
His character might develop a sense of protectiveness. For example, he may start to see Sakura as someone worthy of his protection, which is a new feeling for him as he was previously more focused on his own goals in the Naruto universe. This could make him more empathetic towards others in general.