hmm, well, they did "flirt" after the third players match... but funaQ was pretty pissed off about it so i just thought, "hell yeah funaQ is so jelly" but idk... tbh i still much more prefer kiyosumi. dont get me wrong, the cute characters are mostly in achiga(kuro,yuu,ako,arata(shizu...idk)) but i love saki and nodoka too much.
and in regards of shiratodai...hmm...i think sumire x teru could work. but i didn't see much of them in achiga...sumire and teru rarely share a screen together but judging from the hype, something probably happened in the manga.