Royal by Jaclyn Osborn

It’s hard to forget your first love. Royal has tried moving on, but his mind—and heart—won’t allow him to forget Grayson, his high school best friend and the man who’d been his sexual awakening. But a mistake in college tore them apart.
Eight years later, circumstances push them back together.
When a serial killer who targets public figures comes to Addersfield, Royal is shoved back into the arms of his detective ex-boyfriend. Old sparks reignite, as do past heartaches, as the two men are forced to work together. Back in each other’s lives, it’s impossible to ignore their deep connection but hard to move on from what tore them apart in the first place.
A dangerous game unfolds as Grayson investigates the murders, fighting against time, to catch the killer before it’s too late. It’s not only his life on the line…but also his heart.