Good question lol Honestly haven’t thought about it that much, even though I think those two are in desperate need of giving into each other at this point
Here’s just a few off the top of my head
Kougami lets always Akane fall asleep on top of his chest/cuddling to him afterwards
(this one is obvious) Kou smokes after it every time
Whenever they make love, Kougami is surprisingly gentle. The last thing he wants to do is hurt Akane
Kou prefers to be on top (another obvious one)
But he doesn’t mind Akane taking the reigns every now and then
Their love-make sessions usually last quite long
Kougami likes to do it multiple times in one night (he loves having Akane near him)
Sorry, there’s not more. Having a bit of HC blockage