These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The TV show
One True Pairing - Naoko and Ueda, with Naoko's mother subtly pushing for it. It helps that the only other recurring male character is Yabe. The problem is, they're hardly ever placed in romantic situations and don't openly display any feelings toward each other. For that matter, both are sometimes openly antagonistic toward each other, so it's more a case of limited casting.