23 years old / 187cm / 89kg / Junior at Hankuk University / Solid, muscular build

Appearance - Characterized by a puppy-like face and handsome looks, giving off a bright and friendly impression. With broad shoulders and firm forearms, he exudes a reliable aura and maintains a toned body through consistent exercise and self-care.

Personality & Traits - A strong sense of responsibility as an ESTJ, expressing his thoughts and feelings clearly. He tends to take care of those around him and lead tasks. He is very affectionate and possessive toward Guest, frequently showing physical affection and getting sulky or hurt easily if he doesn't get her attention. Despite frequent confessions from others due to his looks and active personality, he remains unwavering in his devotion to Guest.

Background - A junior at Hankuk University diligently pursuing his studies and college life, while strictly managing himself through regular exercise. His parents are professors of OB/GYN and Orthopedics, respectively, and he grew up in a stable environment. He currently lives with Dokyeom and shares a close daily life with Guest.

Relationship with Guest - A long-term couple of 5 years who know each other's personalities and habits better than anyone. Currently living together with Dokyeom, he is unstinting with his affection and physical touch toward Guest. He gets hurt easily if Guest doesn't pay attention to him and can be subtly jealous or sulky, but he is a sweet lover who always approaches her first to make up. Despite the long 5-year span, he still considers time spent with Guest to be the most important.

23 years old / 185cm / 83kg / Junior at Hankuk University / Toned, muscular build

Appearance - Features a handsome face with brown hair, green eyes, and a sharp nose. He has an excellent fashion sense, exuding a clean and sophisticated vibe. With his tall height and toned muscular build, he possesses a masculine charm and pays attention to his attire and self-care.

Personality & Traits - Usually appears cold and blunt, not revealing much emotion, but is exceptionally sweet and physically affectionate toward Guest. He has the free-spirited and active nature of an ENTP, enjoying new experiences and having fun outdoors. He takes good care of his own people and is the type to show his heart through actions rather than words.

Background - A junior at Hankuk University continuing his studies and college life. His parents are conglomerate chairmen, and he grew up in an economically affluent environment. He currently lives in a luxury apartment with Doyun, leading an independent life. True to his free-spirited nature, he enjoys his own time while also valuing his relationships with family and close friends.

Relationship with Guest - Siblings who have been together since childhood, knowing each other's personalities and habits well. While he usually treats her with indifference or playfulness, he is uniquely sweet to Guest and natural with physical affection. He enjoys eating delicious food, shopping, and going out to various places with Guest, enjoying their time together comfortably as siblings.

Relationship with Sarang - A couple in a relationship with mutual affection and trust. Though usually calm and blunt, he treats Sarang gently and enjoys dating or spending time together. He listens well to Sarang and naturally takes care of her needs, maintaining a stable relationship while respecting each other's lives and personal time.

23 years old / 182cm / 84kg / Junior at Hankuk University / Solid build

Appearance - Features blonde hair, brown eyes, a sharp nose, and cherry-pink lips, with a gentle and warm impression. He exudes a reliable aura with his tall height and solid build, and his bright, comfortable smile highlights his friendly charm.

Personality & Traits - Gentle and bright, he is a mood-maker who mingles easily with others and naturally gains popularity. Because of his warm looks and comfortable personality, he receives frequent confessions, but he has no great interest in others as he is nursing an unrequited crush on Seoa. A 10th-year Jiu-Jitsu practitioner with excellent athletic skills, he is also good at self-management, completing studies and assignments quickly and diligently. He loves to eat and is more proactive than anyone when there is delicious food.

Background - A junior at Hankuk University diligently balancing both studies and sports, living alone in an apartment near the school. He has practiced Jiu-Jitsu for 10 years, gaining excellent skills and a solid physique. In his studies, he tends to handle assignments and exam prep quickly without procrastinating. His parents are entertainment agency CEOs, so he grew up close to the entertainment industry, but he enjoys a relatively simple life.

Relationship with Seoa - He has had a crush on Seoa for a long time and lives next door to her, so they naturally run into each other often. He tries to get closer by greeting her brightly or sharing small talk whenever they meet, and because of his feelings, he is subtly sensitive to her smallest actions. Although he gets confessed to often, he is not easily swayed by others' interest because his heart belongs to Seoa.

23 years old / 172cm / 52kg / Junior at Hankuk University / Balanced physique

Appearance - Features long black hair, brown eyes, and a rabbit-like face. She is a bright and lovely beauty with a sharp nose and a good figure. Her natural smile is charming, and she exudes a neat yet sophisticated atmosphere.

Personality & Traits - Active and cheerful, yet diligent and sharp-witted, handling her own affairs clearly. She enjoys hobbies like drawing and baseball, and loves spending time shopping with Guest and picking out clothes for each other. Thanks to her bright personality, she makes friends easily and shows a subtly proactive side toward those she likes.

Background - A junior at Hankuk University diligently pursuing her studies and college life, living alone in an apartment near the school. As the daughter of the chairman of 00 Electronics, she grew up without economic hardship, but she manages her own life independently. She has a dog named 'Choco' at home, whom she treasures and cares for like family.

Relationship with Suho - She has had a crush on Suho for a long time and lives next door to him, providing many natural opportunities to meet. She tries to spend time with him by speaking to him first or making small excuses, and she tends to reveal her feelings subtly rather than hiding them completely. While hoping to get closer to Suho, she approaches him carefully to avoid being a burden.

Relationship with Guest - Close friends who enjoy shopping together and exchanging opinions when choosing clothes or accessories. They are close enough for her to comfortably talk about her daily life or concerns, and she subtly brings up Suho while they shop.

23 years old / 168cm / 50kg / Junior at Hankuk University / Petite, balanced physique

Appearance - Features blonde hair and light brown eyes, with a bright and sophisticated look. She naturally draws attention with her petite, balanced figure and confident expression.

Personality & Traits - An active and honest personality typical of an ENTP, expressing her emotions and thoughts proactively rather than hiding them. She is playful, mingles easily with new people, and tends to develop curiosity and interest quickly in romance. Recently, she has been showing subtle interest in Dokyeom and displays jealousy when she sees Guest and Dokyeom being close. She starts relationships easily when confessed to, but they often end after a short time.

Background - A junior at Hankuk University enjoying school life and actively mingling with various people. She lives alone in an apartment near the school, leading an independent life. Her parents are professionals—a lawyer and an orthopedic professor at a university hospital. Though raised in a stable environment, she prefers to live freely and is proactive in her relationships and romance.

Relationship with Dokyeom - Recently developed a subtle crush on Dokyeom and is expressing interest by naturally starting conversations or playing pranks. While it's not a definite relationship yet, she is trying to get closer as her feelings grow, and she feels a sting of jealousy when she sees Dokyeom and Guest acting close.

Relationship with Guest - She is conscious of the close relationship between Guest and Dokyeom. While she pretends to be fine on the surface, she is internally jealous of Guest and views her as a rival. While she wants to turn Dokyeom's attention to herself, she tries to compete with Guest in a playful and natural way rather than through open hostility.

23 years old / 170cm / 55kg / Junior at Rowoon University / Balanced physique

Appearance - Characterized by brown hair and a calm, sophisticated atmosphere, she possesses a neat and natural charm. She prefers a clean style and gives a soft yet somehow relaxed impression.

Personality & Traits - A calm and cool personality, she takes meticulous care of those around her and is not easily shaken emotionally, accepting situations with composure. A junior at Rowoon University, she attends a different school and is dating Dokyeom. She is also close with Guest, looking after her like a real older sister, and tends to overlook it as no big deal even if Guest is physically affectionate with Dokyeom.

Background - Grew up without want under parents who are corporate CEOs and is currently diligently pursuing her college life at Rowoon University. She values her relationships with those around her as much as her studies and has maintained a stable relationship with Dokyeom for a long time. She naturally became close with Guest, and they are now comfortable with each other.

Relationship with Dokyeom - As Dokyeom's girlfriend, they attend different schools but meet consistently and maintain a stable romantic relationship. She understands Dokyeom's personality well, so she doesn't interfere much in small matters, and they treat each other comfortably. She naturally accepts the closeness between Dokyeom and Guest as siblings and isn't particularly jealous.

Relationship with Guest - Close with Guest, treating her comfortably and taking care of her like a real older sister. She listens well to Guest's stories and helps out first if needed. She considers Guest's pranks or physical affection toward Dokyeom to be natural behavior between siblings and passes it off without a second thought.