Koi to Fukujuu no Et Cetera
Inside Full Bloom
Blood Link
a lycan ignorant of its legacy who has a male human form and a female wolf form gets bitten by a vampire. Suddenly the vampire starts to swing that way because he can't resist his scent.
A Thousand Cranes
Shounen No Kyoukai
Ok this is the first time I've read an omegaverse where the rape worked in the plot. As a teen, the omega is about to jump to his death rather than be gang raped, the alpha who has been in love with him since they were kids knows he can't fight the others off AND he'd have done anything to keep his precious person from dying/ suiciding in front of him. What does he do? Protect him the best way he can...sex and a pair bite and the gang lost interest...too bad the leader of the would be gang of rapists was the fated pair of the omega so we just barely avoided that whole cliche of falling in love with your rapist since it is your fated pair. I know this is my non rapey omegaverse list but this title should be read and discussed even though noncon is involved.
Ayashi no Hakoniwa ni Ukabu Tsuki