Man, this hits close to home because I feel like so much of the Jujutsu Kaisen fandom leans super hard into the romantic tragedy side of things, which is valid, but sometimes I'm just starving for fics that really dig into them as individuals, you know? Like, who are they outside of being potential partners?
I keep coming back to 'Static on the Line' by HikariZero. It's an AU where they're both just regular people working a late-night radio show, and the slow unpacking of their respective traumas through these fragmented, anonymous phone calls is brutal in the best way. Maki's anger isn't just a cool character trait; it's this heavy, exhausting thing she carries to work every day. The author does this thing where Yuta's empathy feels almost painful because he's so aware of his own need to be needed. Their development isn't about fixing each other, more like... accidentally holding up mirrors.
Another one I'd throw out is 'The Weight of This Sword.' It's a canon-divergence where Yuta doesn't leave for Africa. Instead, he's there during the Zen'in clan massacre. The character work is less about dialogue and more about action—how they navigate shared space in the aftermath, how Maki's single-minded focus clashes with Yuta's tendency to absorb the mood of a room. It gets pretty dark, but the progression feels earned, not edgy for the sake of it.
Honestly, a lot of the best development fics for them live in that awkward space between pre-relationship and deep, platonic loyalty. You have to sift through a mountain of pure fluff or pure smut to find them, which is its own kind of treasure hunt.