His Brazen Angel by Tessa Blake

Alyssa
I’m tired of being the cliché glasses-and-ponytail girl who needs a makeover. Halloween seems like the perfect time to debut a new me—one wearing very few clothes and covered in glitter. I may be dressed as an angel, but I’m ready to be very, very bad …
What I didn’t count on was Devlin Cole. He’s sweet, sexy, and so, so serious. I was planning to love him and leave him, but this good-girl-turned bad may have bitten off more than she can chew.

Devlin
I don’t have time for parties, costumes, or girls. I’ve got grades, sports, and my teaching assistant job to think about, and honestly I’m just fine with that. Then a sexy little angel shows up at my frat’s Halloween costume blow-out, and next thing I know I’m taking her up to my room
And when I wake up the next morning and realize Alyssa the angel is one of my students? Well, all hell breaks loose. And that’s just the beginning.