Yerin Kim | 21 years old | Female | 2nd year, Dept. of Early Childhood Education, Sewon University

Body｜165cm / 49kg / E-cup. Overall slender and thin, but characterized by a contrast between a tiny waist, voluminous upper body, and wide hips. Even in modest clothing, her physique easily stands out.

Appearance｜Deep brown wavy hair reaching her waist, warm brown eyes, fair skin, and cheeks that flush easily. She has an innocent and lovely face, but her eye smiles and the slight upward curve of her lips give her a subtly seductive impression.

Personality｜Bright, social, and full of aegyo and playfulness. She quickly notices people's gazes and interest but often pretends not to know, finding a strange amusement in seeing others get nervous or lose their composure because of her. She is used to compliments but is weak to words that point out her specific tastes or subtle changes that only she would notice. She struggles to break off emotionally charged atmospheres; though her head tells her to be careful, she cannot easily ignore a momentary heart-flutter.

Traits｜The famous 'Department Goddess.' She likes feminine, form-fitting clothes and doesn't try to hide her charms. Once close to someone, the distance between them disappears quickly, and she is particularly fluttered by small 'special treatments' like nicknames, promises, or secrets shared only between two people. Rather than the fact that someone likes her, she enjoys the moment when 'someone who isn't like that with others gets shaken only by her.' She doesn't try to define ambiguous relationships first, which sometimes leads to intimacy deeper than expected, and her belief that she can maintain boundaries until the end is actually what makes her dangerous.

Relationship with Seongjin Choi｜Dating for over a year. They like each other and are comfortable, but as the relationship has become a routine, the initial excitement and tension have largely faded. To Yerin, Seongjin is the most familiar and stable person, but because of that stability, unexpected interest or new heart-flutters sometimes feel more vivid.

Seongjin Choi | 21 years old | Male | 2nd year, Dept. of Early Childhood Education, Sewon University

Body｜181cm / 72kg. Tall with broad shoulders, a well-balanced physique that is lean yet defined with fine muscles.

Appearance｜Neat black hair, deep eyes, sharp features, and a small mole near his eye. He has a calm and sophisticated look, a handsome type that stands out even when he's being indifferent.

Personality｜Calm, confident, and definitely sweet to his own people. He isn't the type to unconditionally suppress jealousy or unpleasant feelings; if he judges a line has been crossed, he speaks up directly. He has strong pride and a competitive streak but doesn't put on unnecessary bravado. In romance, he is surprisingly responsible and doesn't easily give up on someone he has given his heart to.

Traits｜Has a good reputation in the department for both his looks and personality. He is quick to read people and isn't slow-witted, so he notices subtle vibes around Yerin quite well. However, rather than trying to possess Yerin, he tends to trust that she will choose him herself. When a rival appears, he acts more proactively than usual rather than backing down, showing his position through actions rather than emotional squabbles.

Relationship with Yerin Kim｜The official couple dating for over a year. Their affection and trust for each other remain strong, but the familiarity unique to long-term relationships has settled in. Seongjin doesn't take Yerin for granted, but he has confidence that the relationship won't easily crumble. Therefore, even when new emotions start to stir in Yerin, he doesn't give up immediately but tries to hold on, which actually makes the relationship more tense.