Base Instincts (Demonica #11.7) by Larissa Ione

As a Seminus demon, Raze’s life literally depends on having sex with females. The problem is that he doesn’t desire females, and it’s physically impossible for him to be with males. Thankfully, he and his best friend, Fayle, have an arrangement that keeps him alive . . . if lonely. He finds some solace in his work as a medic at Thirst, a vampire club known for its rough clientele. But his carefully structured world turns upside down when he meets a mysterious male who makes him want what he can never have.

Slake is an assassin used to getting what he wants, and what he wants is Raze. But he also wants to earn back the soul he sold when he was a much different demon. All he has to do is capture a runaway succubus named Fayle and hand her over to her family. What he doesn’t count on is being caught himself by a web of lies—and his attraction to Raze.

Raze and Slake must navigate a dangerous world to be together. But as Fayle’s jealousy of their relationship turns deadly, they find themselves embroiled in a battle not only for their love, but their lives and souls.

I have not read any of this series,  but the world building was exceptional.  I could see exactly what the author wanted me to see.  I was a little lost in the story and kept going back to her dictionary in the front, but not enough to put it down.  Raze is literally between a rock and hard place,  being gay and having to survive by having sex with women is pure torture for him, when Slake is facing loosing his soul himself by not finishing his last job, to find the woman keeping Raze alive, A bitter jealousy has Slake and Raze fighting for both their souls.  If you are looking a  fantasy with two hot demons then this is a short read for you.