Luxuries of Lust by Nik Knight

When it came to love, Rusty had resigned himself to never being enough, and Gem knew he would always be too much. Turns out, they were both wrong.
As a Pyclon from Lust, Rusty learned early the cruel rules of the Pentagram. Happiness is for the privileged. Hope for the weak. And absolutely nothing comes free. So he accepts a life of happy enough, of good enough, of just… enough. Anything more is impossible for someone like him.
That is, until he meets Gemae Akyllo.
With a brain that never rests and an ass that won’t quit, Gem is objectively a lot. His physical size is rivaled only by that of his personality—neither of which he will ever apologize for—but there’s a cost. He’s fun for a night, chosen first for a good time, but come morning, his bed is cold and empty. Always wanted, but never kept.
That is, until he meets Rusty Róisyn.
Rusty never wanted love, and Gem doesn’t need it. But together, they find it all the same.