Man, the dynamics with Hachiman and Saika are weirdly underused. I think the best stuff leans into Saika's ambiguous nature—not just 'is he a girl or not' but the fact his kindness is genuine, and Hachiman's whole worldview is built on seeing kindness as a transactional lie. When a fic makes Hachiman confront someone whose niceness isn't a performance, it cracks his armor. I read one where Saika quietly calls him out on his self-sacrifice shtick, saying something like 'You keep saying you hate nice girls, but you're the nicest person I know, even if you're mean about it.' That silent, observant pushback from someone Hachiman can't easily categorize or dismiss is gold.
It works best in quiet, introspective scenes, not big dramatic confrontations. Like them sharing a train ride home after a club event, or Saika asking for advice on how to deal with being misunderstood. The tension isn't romantic or sexual for me—it's this profound philosophical itch Hachiman can't scratch. He can't fit Saika into his boxes, and that unsettles him more than any outright hostility from Yukino ever could. Ends up being a mirror held up to his own contradictions.