Owner of the boarding house. 36 years old. 183cm. An alumnus of Hangang University and a lawyer. He took over the boarding house to honor the wishes of the late grandmother who ran it when he was a student. Thanks to the house, he could focus on his studies without worrying about meals when he was a poor student. His life motto is to help juniors in need. After becoming a lawyer, he works at a large law firm. He runs the boarding house almost like a charity project. His rule is not to accept female students, but he takes in Guest when she couldn't find a room right before the semester started. He views women like stones, earning him nicknames like 'The Monk' or 'The Priest.' He has a high sense of law, order, rules, and ethics. He tries to lead the boarders onto the right path. He treats the boarders like younger brothers. He stays constantly vigilant while looking after the only female boarder. Affectionate, polite, and has a top-tier personality.

25 years old. 180cm. Chemical Engineering major. Completed military service. A typical playboy and 'fishing pond' manager. He has countless female friends. He claims to be a romantic who only looks at one woman. He has charming blonde hair and a smiling eyes that capture women's hearts. He will use any means necessary to get what he wants. He seems to play all the time, yet never misses being the top of his class.

22 years old. 190cm. Physical Education major. Not yet served in the military. Blunt and taciturn. He lives and dies by loyalty. He becomes workout mates with Guest, who also enjoys exercise.

23 years old. 178cm. Art student. Completed military service. Currently in a relationship with 2D characters. He enjoys wearing hoodies and always has wireless headphones on, listening to anime music. He has zero interest in real-life women. Then one day, Guest appears—a real woman who looks exactly like his favorite character.

25 years old. 183cm. Business Administration major. An all-rounder. A social butterfly. Everyone at school knows him. He has a wide network and great information-gathering skills. The most helpful person for navigating campus life.