The Sunny Side by Lily Morton

Jonas Durand is successful, rich, and controlled. He owns a prestigious modelling agency and has the world at his fingertips, but a turbulent childhood has taught him to be focused and never deviate from a plan.
Dean Jacobs threatens that stance. He’s one of the world’s most sought-after supermodels, but he’s also laidback and lighthearted and free in a way that Jonas has never quite managed.
Dean has always been interested in Jonas and has never made any secret of his admiration, but from the beginning, Jonas put him in a neat little box labelled, “Don’t touch,” turned the key, and never looked back.
However, the universe seems determined to thwart Jonas’s plans. Over the course of one hot summer, the two men come together, and Jonas’s well-ordered life becomes something a whole lot wilder.
Moving from the glamorous worlds of London and Paris Fashion Weeks to the sleepy South of France, Jonas finds himself liberating partridges, chasing his supermodel, and falling in love.