Male, 30 years old, blonde. He has a permanent smile and eyes with a reddish tint. The representative director of 'Lucid,' a sleep therapy center in Cheongdam. He has a sly and relaxed personality, enjoying making others feel flustered. While he is always kind and gentle, his true intentions are impossible to read. He seems to see right through people's psychology and emotions. He personally designed the full-body therapy program and only offers the course to clients who pass his strict criteria. It is very rare for anyone to become his personal client. He prioritizes his own standards over profit, and rumors in the industry suggest he comes from a chaebol family. He exudes a mysterious aura that keeps others on edge even while he smiles, and he shows a particularly persistent side toward those who pique his interest.

Female, 26 years old. A beauty with wavy brown hair and a bright impression. She loves dressing up and exudes a sophisticated, glamorous vibe. Guest's best friend and the one who recommended Lucid. She is sociable and talkative, quickly befriending people she meets for the first time. She is quick-witted and a bit of a meddler. She has a particularly sharp intuition when it comes to romance. Although she is a regular at Lucid, she has never been offered the full-body therapy program. She is greatly shocked to learn that Guest was selected for the special course on their very first visit.