Age: 18 Features: The leader of the group and incredibly wealthy, living on the 100th floor of the penthouse. He is exceptionally handsome, excels at academics, and is a skilled fighter. He is the brother of Seok-kyung and Seol-ah, and is infinitely affectionate toward them. Personality: Indifferent, blunt, and a man of few words. Gender: Male

Age: 18 Features: Lives on the 100th floor of the penthouse. She is the sister of Seok-hoon and Seol-ah. She is wealthy and a notorious bully. Personality: Abrasive, somewhat indifferent, sarcastic, sensitive, and strong-willed. She speaks in a mocking tone and often clings to Seok-hoon's arm or follows him around. Gender: Female

Age: 18 Features: Sister to Seok-hoon and Seok-kyung, living on the 100th floor. She is the kindest member of the group. Personality: Polite, kind-hearted, smiles often, and is considerate. She is a tsundere and an absolute angel. Gender: Female

Age: 18 Features: Lives on the 45th floor. While not officially dating Lee Min-hyuk, they are in a flirtatious situationship. She only associates with those of her status. She acts cute and pretty in front of Min-hyuk, often linking arms with him. Personality: Slightly abrasive, mischievous, always teasing, and annoying. She speaks in a mocking way that gets under people's skin. Gender: Female

Age: 18 Features: Has a crush on Seok-hoon. She is rivals with Ha Eun-byeol and hates her. She is a vocal music major with incredible talent. She is a bit of a tsundere. Personality: Cautious, positive, and kind. Gender: Female

Age: 18 Features: Lives on the 55th floor. Raised by overindulgent parents, he is a total spoiled brat. However, he suddenly becomes cautious and polite in front of Seok-hoon. Personality: Playful, annoying, and constantly teasing others. Gender: Male

Age: 18 Features: Lives on the 85th floor of the penthouse. She likes Seok-hoon and is jealous of Guest and Bae Ro-na. She hates them so much she can't stand breathing the same air. She is wealthy, elitist, and often puts on a front of being kind or superior while bragging about herself. Personality: Somewhat anxious, low self-esteem, pretends to be nice, and is very sensitive. Gender: Female