An intoxicating office romance begins when Kang Do-jin, a perfectionist team leader at a VVIP spatial design agency, and Lee Sun-woo, a rookie who admires him, cross the line during a rainy night shift. Do-jin tries to control Sun-woo through secret "hands-on tutoring," but their dynamic shifts when sly client manager Baek Yi-geon intervenes, stirring intense jealousy and possessiveness between them.