>>106227411The premise baits with the idea of hate sex, but more often than not that isn't how it works.
The idea stems from two people having a pivotal conversation and realising that despite huge differences in morals or beliefs, that they are at a similar wavelength emotionally and intelligently.
This then starts to fan out into little interactions that start to chip away at said hatred by showing things the two have in common and can even start to be backed up by flirting, either accidental or intended.
Superhero/villain doujins during the MHA peak covered that genre a lot.