There are dark versions of certain characters that aren't part of the 2P!universe, such as Spain and Russia's dark sides (that contrast with theyr normally happy sides), black!Italy, and black!Japan. I'd like to see one of these dark characters trying to dominate against a 2P character, enjoying the fighting and getting turned on by it.

Bonus: the 2P character is male (I don't really want any het or yuri in this)
Bonus: hot, angry, violent smex please, with a side order insults