Raising the Sun by Eryn Hawk

Isaac Miller is a failure—in business and life—but he’ll be damned if he asks for help. When his older brother sends him to an occult shop of all things, the cryptic man behind the counter offers up a spell that’ll supposedly lead him down the path of success. Isaac doesn’t believe in magic, but when the incantation causes a demon to show up in his bedroom through a puff of smoke, he may have to reassess his beliefs.
The beautiful yet arrogant menace holds the key to all of Isaac’s desires, but apparently, the morally grey don’t work for free.
Amadeus, ‘Ash,’ is growing weary of his usual mischief and mayhem, and is in need of some thrilling venture to sink his fangs into. When he finds himself summoned to the human realm by a delightfully desperate florist, it’s as if fate has dropped an entertaining new endeavour into his lap. Luring the innocent man into his bed would be one way to cure his boredom, so what’s the harm in pretending it’s part of the deal?
What Ash doesn’t expect is to feel compelled to heal the defeated creature, and discover that doing so might just fill the void in his soul.

Could this accidental summoning turn into the perfect arrangement? Or is the road to happiness paved with malicious intentions and wilted blooms? There’s one way to find out.