-This throuple is like, two guys and their attack dog. At a glance it would seem like SQQ and SQH are the two guys and LQG is the attack dog, but it actually depends on the situation.
-SQQ is the attack dog for winning verbal arguments, and Shang Qinghua is unleashed when the best solution would be to just ruin some clan's big picture financial prospects for the next ten generations. Liu Qingge might stab you but the other two are more likely to make you wish someone had just stabbed you.
-Yue Qingyuan has mixed feelings about this whole situation, but standing on the outside and smiling sadly at this strange adult version of Xiao Jiu while he moves on with his life without him feeds his emotional masochism, so that's mostly what he goes with.
-Qi Qingqi did not know that men could have polycules. She thought this was mostly just something women did when they smartened up and realized that having sex with each other and locking their shitty husband out at night was a better way of coping with being in a harem than competing. Live and learn.
-Luo Binghe eventually joins Cang Qiong (despite numerous efforts to get him into some other sect) by climbing Bai Zhan Peak. SQQ and SQH start coming up with contingency plans for what to do if there's some sort of "kill his own shizun" mandate in effect and Liu Qingge bites it. This is useful stuff just in general, given that Liu Qingge is still just lousy with character death flags and also has literally made it his job to run headlong into dangerous situations.
-Shen Qingqiu still manages to die the most.
-Mu Qingfang doesn't know why these two specific martial brothers of his with like zero medical training keep coming to him with new miraculous methods for healing multiple amputations and heavy blood loss, but he is NOT complaining.
-Huan Hua Palace Master likes to make insinuating remarks about Cang Qiong's "famous fraternal love" between peak lords in a way that seems perfectly polite but also implies something seedy is going on. This doesn't work out well, mostly because it flies right over Liu Qingge's head, Shang Qinghua is just nodding along and feeding every scrap of HHP intel he gets to Mobei Jun, and Shen Qingqiu's roasting ability was forged in the fires of online comment sections, so pitting him against a tacky drama villain is like releasing a feral cat onto a small island that has only evolved flightless birds with no native predators.
-It actually does take them a while to start fucking. Mainly happens because of sex pollen the first time, of course, and then Shang Qinghua has to just be like "that was fun, let's do it again" so that Liu Qingge and Shen Qingqiu can yell at him about it until they calm down enough to agree.
-Liu Qingge keeps trying to get Officially Married, but Shang Qinghua doesn't want to do the paperwork (worries he's secretly the third wheel and they're going to want to get rid of him at some point), and Shen Qingqiu doesn't want to firm things up until after the plot has passed (thinks he might still get murdered and doesn't want to make things 'messy' if that happens).
-There is a persistent external impression that the shrewd & scheming SQQ and SQH have basically beguiled and bewildered Liu Qingge into their beds in order to exploit his potential and use his body. Shen Qingqiu tears this porn to shreds, Liu Qingge is reluctantly into it, and Shang Qinghua is just surprised to be cast as a top even though he's the shortest.
-Mobei Jun trying to figure out how to navigate human culture just well enough to get into the polycule but only to exclusively date Shang Qinghua is the lady with the math equations meme.