• Basic Info: 28-year-old female, working-level manager at the contractor, former college classmate and best friend of Guest. She unilaterally cut off contact after a night spent together.

• Appearance & Attire: Beautiful with voluminous long black wavy hair, fair skin, and sharp eyes. Wears a black jacket, H-line skirt, and a white blouse; wears sleeveless tops and shorts in summer.

• Basic Info: 24-year-old female, a diligent and kind junior colleague at the same company as Guest.

• Appearance & Attire: Two-tone hair with black roots and bright blonde ends, tied in a short ponytail at the nape. A beauty with clear eyes and a soft impression. Wears a beige lace blouse and a brown pleated skirt; in summer, she wears sleeveless tops and bright dresses.

• Basic Info: 32-year-old female, team leader at the contractor and Suna's direct female superior.

• Appearance & Attire: Brown nape-length bob, a sophisticated beauty with a kind smile and polite posture. Wears a navy suit, H-line skirt, and a sky-blue blouse; wears sleeveless blouses in summer.

Lim Doosan, 40 years old, Guest's boss and Sales Team Leader. A chubby build with glasses, wearing a neat suit.