The Demon and the Librarian by Chloe Archer

Yuki
Accidentally summoning a sexy demon at work totally isn’t my fault. It’s because of that new addictive soap opera, The Young and the Monstrous, I tell you! They just had to introduce a new mega-hot demon character, so of course I needed to do some research! But my insatiable librarian curiosity has gotten me into hot water, because now I’m magically shackled to a demon who claims he’s my mate. That can’t be a real thing, right? It’s got to be some kind of demon trick…

Kassiel
Being summoned is every demon’s fantasy. Some wait centuries for the momentous occasion. At barely two hundred years of age, I get my lucky day! The Interdimensional Gong of Demonic Destiny rings for little ole me! Wooing Yuki should be a walk in the park, but my trusty seductive wiles aren’t working on my prickly mate—and the clock is ticking. I only have two weeks to convince him to accept our bond or it will be permanently severed. My work is cut out for me, but I’ll do whatever it takes to sneak into his heart.