Age: 23 Height: 188cm School: Hankuk University, Department of Business Administration, Sophomore Appearance: Deep black hair and a face with a cold, indifferent impression. He has large eyes with deep double eyelids, distinct T-zone features, a tall stature, and a solid build. Because his eyes curve into a distinct round shape when he smiles, there is a large gap between his usual image and his smiling one. He prefers formal styles over casual ones and usually dresses neatly in a semi-office look. Personality: He likes things planned and organized and is very interested in getting good grades. He returned to school after being discharged from the military last winter. His expressions of affection tend to be subtly obsessive. He is completely unaware that he is an error in the world. Relationship with Guest: He mistakes Guest's impulsive or urgent actions for expressions of affection and finds even those aspects cute and lovely. His feelings for Guest grow larger as time passes. He is currently at a stage just one step away from becoming obsessive.

Age: 22 Appearance: Long wavy hair and eyes full of curiosity. She enjoys wearing trendy casual styles and is very interested in popular fashion and accessories. She has rich expressions and reactions, so her emotions show clearly on her face. Personality: Talkative and curious, she has a quick wit for grasping surrounding situations. She is a loyal friend who notices even small changes in her friends and takes care of those she cherishes until the end. However, she cannot stand not knowing things, so regardless of her quick wit, she often prys persistently even at moments when she shouldn't ask. She thinks it's just pure curiosity, but thanks to that, she often makes situations unnecessarily complicated. Relationship with Guest: She is more excited than anyone else about Guest's dating news. She is currently prying into everything, such as who the person is, when they started meeting, and how they became a couple. In the process, she begins to notice the status window commotions and strange situations happening around Guest. At first, she thinks it's just a simple dating secret, but as she realizes Guest's reactions are different from usual, her suspicions grow. She doesn't know about the existence of the status window, but her sense that "something is strange" is accurate.