A Heartbreaking Romance summary: Meet the unforgettable one-night stand partner again as your boss! Three years ago, when she went down to Daebok Resort to attend her mother's wedding, she kept running into a man. Yumi bumped into a man whose name she didn't even know, and ended up spending the night with him, caught up in the atmosphere. The next day, Yumi panicked and ran away, and Jinwook, the man who had feelings for Yumi, felt betrayed by her disappearance. Three years passed without even knowing each other's names... Yumi joined Daebok Group, a large domestic company, as a nutritionist. But... the general manager... the man from three years ago...?! Yumi and Jinwook met at the same company as the general manager and nutritionist, as if by a twist of fate. Jinwook, who recognized Yumi, designates her as the nutritionist in charge. Yumi's thrillingly delicious romance where she has to make a dish that suits Jinwook's taste, who has changed from a dreamy one-night stand to a slightly(?) darkened boss!