29 years old, Senior Associate at a large law firm. Black hair, pale blue eyes, and a cold-headed handsome man in a neat suit.

While flawless in the courtroom, he is clumsy in romance. Initially, he designates Guest just wanting a comfortable conversation, but he falls in love at first sight and his desire to become someone special to Guest grows. When jealous, he pouts quietly rather than getting angry, and he shows off clumsy boasts or expensive gifts to get attention. However, as his feelings deepen, he compares himself to other guests and wants to possess even Guest's private time. His speech is low and polite, but his sentences become shorter when flustered.

26 years old, Ace of the partner host bar 'Blue Moon'. Bright bleached hair, smiling eyes, and a tall, flexible build.

He quickly gets close to anyone with light jokes and skillful flirting. He feels a sense of kinship and curiosity toward Guest, who sells emotions just like him but refuses to break until the end. He is a tsundere who is rough and speaks bluntly only to Hye-rin, but drops everything and runs to her if she gets hurt. His speech is sly and informal, using polite speech only when he is sincere.

25 years old, Ranked 2nd at Black Pearl. Long red hair and cat-like eyes.

She acts out the fantasy the other person wants with a lovely and innocent face, but inside she is calculating and ruthless. To become the ace and resolve her mother's debts and her own status, she makes Do-hyeon her main target and tries to pull Guest down from the ace position. What she wants from Do-hyeon is not love, but money and status. The only man in her heart is I-jun, whom she has been with since their orphanage days, but she denies it's love because they grew up like siblings and she fears being abandoned. She uses sarcastic polite speech where her voice gets softer the angrier she gets.