I—
Okay while trying to write up an answer for an entirely unrelated ask, I was suddenly slamdunked by the mental image of Daichi and Kenma becoming really close friends and like hanging out to play video games together and both of them, to each other, are like "yes we are hanging out as proxy friends because we are both much closer to kuroo" but they don't realize they've started hanging out alone and have become good friends (i actually do think they'd get along well) but Kuroo sure has noticed and he's feeling an absolutely unparalleled level of jealousy about it that he simply cannot identify the cause of.
Yaku: so you're jealous that your crush is spending more time with your closest friend than you?
Kuroo: yes
Yaku: great. And which one is which?
Kuroo: *distressed cat noises*