Chemistry teacher Ashleigh Hutchinson knows better than anyone that love and lust don’t mix. The feelings come from different hormones, they trigger different responses, and they demand different reactions. Which is why she doesn’t date. She hooks up. No catching feelings required.

When Ashleigh is fired from her job without notice, she signs up to participate in a month-long sleep study, which will pay her enough to cover rent while she job hunts. It seems easy enough—until she walks into the clinic and finds herself staring right into the gorgeous eyes of Xander Miller, the only man to have ever tempted her to abandon her no-relationships rule.

When Xander and Ashleigh realize the study is only looking for couples, they agree to pretend to be together—which means sleeping in the same bed every night for the next few weeks.