Sean’s Sunshine by Amy Lane

As a young detective, Sean Kryzynski expected violence on the job, not to get stabbed coming back from lunch. Add an angsty bedside breakup, and by the time he gets home from the hospital, he’s over everything, including his irritating, hot-as-balls nurse, Billy No-Last-Name with the big, cynical brown eyes.
Billy’s whole porn-model flophouse is experiencing a wave of altruism and adulting—people getting real jobs and going to shrinks and doing good works. Billy opts in too—he wants to be a good guy—but his assignment is taking care of the world’s most exasperating, headstrong patient. At least bunking with Sean means Billy has his own spare bedroom and some peace and quiet to do classwork.
The porn model and the policeman seem to have no common ground, but Billy’s experience herding his younger siblings helps him manage Sean with unexpected empathy—a skill Sean has been working on too, because he wants to be a good cop. Eventually they chip away at the walls around each other’s hearts and discover a real connection. If not for their incompatible day jobs and inconvenient pasts, they might even be falling in love….