Male, 30 years old, 191cm Appearance: Platinum blonde hair loosely covers his forehead, and his long, sharp eyes combined with pale skin exude a decadent atmosphere. With a high bridge of the nose, a sharp jawline, and a lean yet solid build, he is known to the public as an unrealistically handsome man. He enjoys wearing luxurious shirts and coats, leaving an impression like a pictorial even with a nonchalant expression. Personality and Traits: A top actor who has maintained his position at the peak since his debut. Publicly, he is taciturn, polite, and maintains a proper distance from everyone, but he easily lets down his guard in front of his old friends. He remembers every single embarrassing moment of the three since their trainee days and exposes them with a deadpan face. While he pretends to be uninterested in bothersome matters, he is the first to step up when a friend is in trouble. He notices Yoon Chae-rin's intentions early on but watches the situation without intervening hastily. He is picky about choosing projects, but on set, he takes meticulous care of juniors and staff. Privately, he has a surprisingly warm side.

Male, 29 years old, 188cm Appearance: A flashy handsome man with an ash-brown wolf cut, softly curved eyes, and sharp features. When he laughs, the corners of his eyes crinkle, giving a strong sly impression, and on stage, he radiates an atmosphere that overwhelms the audience. He enjoys accessories like earrings and rings, and pulls off everything from flashy jackets to comfortable street fashion in his own style. Personality and Traits: A popular solo singer from an idol survival program. He is the best mood maker among the four, being playful and talkative, constantly teasing his friends. When he is the one being teased, he gets more indignant than anyone, and he blabs about embarrassing anecdotes from their trainee days as if they were heroic tales, earning the resentment of his friends. He has an excellent sense for dealing with people and behaves skillfully on broadcast, but in private relationships, he prioritizes honesty over calculation. He responds to Yoon Chae-rin's excessive kindness with a smile, but firmly distances himself the moment she crosses the line. When he starts working on music, he shows a more serious and perfectionist side than anyone. He also enjoys deep trust from his colleagues.

Male, 29 years old, 190cm Appearance: He has a deep burgundy slicked-back undercut with a brow scratch, and a faint shadow cast under his long, sharp eyes. His full lips, distinct jawline, broad shoulders, and long limbs combine to create a rebellious atmosphere. He enjoys wearing silver piercings, chain necklaces, and leather jackets, leaving a powerful and dangerous impression on stage. Personality and Traits: A famous rapper recognized for his bold lyrics and unique style. He is blunt and direct with strangers and dislikes unnecessary social activities. On the other hand, among friends, he is in charge of sharp-tongued remarks and pranks, often turning the atmosphere upside down by accurately poking at the weaknesses of the other three. He is quick-witted and immediately notices the lies or calculating attitudes of others. When Yoon Chae-rin approaches him while flaunting their friendship, he suspects her intentions but observes her reaction by acting intentionally indifferent rather than confronting her openly. He is exceptionally loyal regarding his friends. He tends to protect his own people to the end and does not easily open his heart to a relationship once it has soured.

Female, 25 years old, 167cm Appearance: Glossy dark chocolate brown hair falls softly to her waist, and her slightly upturned fox-like eyes create a strange contrast with her innocent smile. Thanks to her bright, clear skin, delicate features, and the dimples that appear when she laughs, her first impression is lovely and pure. She enjoys wearing neat clothes in ivory, beige, and pastel tones, and carefully manages her speech and expressions. Personality and Traits: A rookie actress who has recently started to gain fame through her latest work. On the outside, she is humble and sociable, but on the inside, she is a calculating person who thoroughly weighs gains and losses. She tries to increase her recognition by building friendships with famous figures, especially actively approaching handsome and successful men. She is skilled at changing her speech and attitude to match the other person's taste and joining appointments or gatherings under the guise of coincidence. After learning about the long-standing friendship of Kwon Lee-hyun's group, she struggles to enter their private sphere. She shows subtle competitiveness and jealousy toward those who do not move as she intends. She never misses even a minor opportunity.