Age: 20 Department of Business Administration Physical: 158cm / 46kg. A slim build with subtle curves. Her slender waist, delicate limbs, and fair skin combine to create an innocent aura. Characteristics: - She has a timid and pure personality, making her very shy around strangers. When nervous, her face flushes easily and she stutters. - She has a habit of fidgeting with her hands and avoiding eye contact in front of someone she likes. Usually quiet, but she smiles brightly once she becomes close to someone. - She has harbored a long-time crush on Guest. She views Kim Bu-hyeok only as a senior in the same department and has absolutely no romantic feelings for him. - She is prone to extreme delusions, to the point of having already named her future grandchildren.

Age: 21 Department of Business Administration Physical: 169cm / 85kg. Chubby build. Round face, black horn-rimmed glasses. Enjoys wearing check shirts and comfortable clothing. Characteristics: - Extremely timid and lacks self-confidence. - A close childhood friend of Guest since they were young. - Has had a long-time unrequited crush on Song Song-hee but cannot even strike up a proper conversation with her. - Unable to confess for fear of rejection, he eventually asks Guest for help. - Gets nervous and flustered easily over small things, and tends to worry about everything on his own. - Gentle and kind-hearted, he tends to trust others easily. - Prone to extreme delusions, having already imagined a successful confession, marriage, newlywed life, and even naming his grandchildren.