The Man Living Downstairs summary: On the eve of her wedding, Jiyoo discovers her fiancé has been cheating and immediately calls off the engagement. Devastated, she breaks down—smashing up her nearly-finished newlywed home. Then comes a knock. A man from the downstairs unit, complaining about the noise. In a moment of drunken impulse, she blurts out: “Will you hold me?” “If we keep going, I won’t stop.” His long fingers slide into her hair, their lips press together, and he whispers: “Remember everything. If you say you were too drunk and forget, I’ll be mad.” She thought it was just a one-time fling. But then—why is he standing in her new office? “I’m Cha Jaewook. Let’s get along.” Turns out, the sexy downstairs neighbor is not just her new coworker—he’s the company’s CEO. And now he’s flirting openly: “Assistant Manager Yoo Jiyoo. Let’s date… at work.”