Chemical Romance by Saffron A. Kent

Penelope Clarke is failing biochemistry and there’s only one person who can help her: Atlas West.
He’s the best tutor on campus, and if Penny wants to keep up her grades and her sanity, she needs him. After all, no one wants a repeat of what happened the last time her grades were at stake. Least of all Penny.
The only problem is that Atlas is extremely distracting.
His green eyes and his rumpled dark hair make her forget everything and daydream. It doesn’t even matter that Atlas can be a rude and arrogant jackass who pushes all her buttons.
But it’s okay.
For the sake of her grades and her fragile mind, Penny can learn to focus. And she’s well on her way to doing that, until Atlas makes a proposition – dinner in exchange for tutoring her…