Neku and Joshua's dynamic in fanfiction often fascinates me because of its foundation in a secret partnership. Joshua, knowing everything from the start while Neku doesn't, creates a massive imbalance of power. Stories that dig into that—the frustration Neku feels being used, the guilt Joshua might carry but never shows, the slow erosion of that hierarchy—always hit hardest. I've read a few where they reunite years later in a normal Shibuya, and the tension comes from them having to relearn how to interact without a game hanging over them. Is it friendship? Something more? The writers let that ambiguity simmer, which I prefer over clear-cut romance.
A lot of the tension also stems from their contrasting personalities clashing post-game. Neku's growth into someone more open but still fiercely himself, facing Joshua's eternal, amused detachment. The best fics don't make Joshua soft overnight; they make him curious, intrigued by the change in Neku, and that curiosity becomes the bridge. It's less about grand declarations and more about two people who shared a profound, traumatic experience finding a new language to speak to each other, often through small, charged moments—a shared glance at Hachiko, a deliberately chosen gift, a withheld secret finally offered.