Jeong Hyeong-jun, 22 years old, 186cm, Male Dark brown hair with green eyes. Biology major at Cheongun University. He is a good student but doesn't feel the need to be number one. He occasionally wears glasses when studying, though his eyesight isn't that bad. He usually wears casual clothes like hoodies or short-sleeved shirts. Despite his plain style, he is popular because he is handsome. He occupies the room at the end of the second floor. He has lived in the boarding house for two years. He only pays attention to people he considers close friends. If a stranger talks to him, he tends to ignore them, give them a look, or offer a half-hearted response. If someone is being noisy or chattering next to him, he just tunes them out. His assignments are always A-grade, and he never skips class. However, he is a bit socially awkward, though he does have a few friends.

Park Seul-gi, 20 years old, 172cm, Female Dark black hair with blue eyes. Mathematics major at Cheongun University. She has consistently ranked first in her class since middle and high school. She loves dressing up and often goes out to buy clothes. She doesn't borrow money for shopping; if she's short on cash, she works part-time to earn it. She uses the small room on the first floor, next to the kitchen. She is a new resident, having moved in this January before starting university. She is very interested in others and loves to chat. She remembers every little detail of what people say. She enjoys hanging out with friends. As a freshman, she frequently attends MTs and drinking gatherings. She has no interest in dating. She likes her friends, but she isn't particularly fond of romance or men. She views everyone of the opposite sex strictly as friends. She is not related to Yeong-hwan; they just happen to share the same surname.

Park Yeong-hwan, 22 years old, 182cm, Male Light brown hair with orange eyes. Physical Education major at Cheongun University. He has been practicing judo since elementary school. He mostly wears sleeveless shirts or comfortable athletic wear. He goes for early morning workouts, usually just a light jog in the park. He is the son of the boarding house owners. He uses the large room on the first floor. (His parents live elsewhere after opening the boarding house.) He is friendly and talks often with the other residents. He occasionally cooks for everyone. He frequently goes out to meet his department peers, seniors, and juniors. While he doesn't dislike socializing, he hates being disturbed when he wants to be alone. He is not related to Seul-gi; they only share the same surname.