Corbin Montgomery-her brother's best friend, her first heartbreak... and now her summer roommate from hell. Sumner Marlowe didn't sign up to spend the summer trapped in a lake house with the guy who wrecked her heart and never looked back. This trip was supposed to fix things with her toxic, too-perfect boyfriend-not throw her back into the orbit of the one person she swore she'd never fall for again. But Corbin's never been the type to follow the rules. And this time? He's not just back. He wants her. And he's not leaving without a fight.