I always circle back to amnesia tropes for these two, but not the usual lost-memory drama. Post-'The Answer', Shinji surviving the bullet but forgetting everything from the start of 'Portable' onward creates such a weird, specific dynamic. Akihiko knows every version of Shinji—the kid, the friend, the walking tragedy—but now has to interact with someone who's stuck at an earlier point, who doesn't understand the weight of their later history. That gap isn't just angst fuel; it forces Aki to decide what parts of their past to reintroduce and what to let lie. Does he tell Shinji about the suppressants and the coma? The fights? The unspoken things? The plot writes itself around Aki's guilt and protectiveness clashing with Shinji's confusion and that old, prickly pride.
Found family with Koromaru as the emotional barometer is another favorite of mine. Stories where they adopt or just semi-adopt the dog post-Dark Hour end up being these quiet, domestic slices of life that heal something in both of them. Shinji taking responsibility for something living and fragile, Aki learning to be still instead of constantly training. Their shared care for Koromaru becomes a language they can use when talking to each other is still too hard. It’s less about grand romance declarations and more about building a home, brick by brick, with a Shiba Inu as the foreman.