I'm not sure how much this counts, but here's a new Sword Art Online doujin where Sugou (Season 2 main villain) brainjacks Asuna (female lead / romantic interest) and uses his hot new Asuka body to do hentai things to Kirito (main character).
http://g.e-hentai.org/g/557874/8ae09dd164/
It's...
interesting.