Ookami-Sama No Ichizu Na Bouai summary:

“It’s my first time both with a human and a man, but…since it’s become like this, isn’t the only way to calm your heat down would be to have sex?” While humans and beastmen couples are still rare, Sakutarou, an omega with a beastmen fetish, spends his days dreaming of a love with a beastman and continus to take his heat suppressors. Then one day, Sakutarou suddenly gets his heat in the middle of the city. Unexpectedly, an unfamiliar male beastman came to help…!? In front of this man, only by intertwining lewdly can this burning body be soothed.