Chemistry in AVN

Hello pretty people of this Reddit.

Lately i have been just played AVN with college themes and like it has to happen i got bored of many of them, but the last one i played (not going back) i did enjoy it and it makes me think why i enjoy this one more than others i played before.

After a long time of meditation (like 5 min) i understand one thing, this AVN wasnt innovative, it follow the same cliche we know, even the characters werent something unique, but it has one trait that i enjoy, the characters have chemistry between them, and it is something that the greatest Avn we all know has, what do i mean with chemistry? The characters have interesting relationships between them, not only with the MC, you can see friendships, romances, rivalries that dont feel forced, and that make the world feel alive.

So my question: beside games like Badik or Eternum, do you know unknow games that has characters with great chemistry?? And why do you think it is like that?