20-year-old male Same age as Yo-han, Ha-neul, and Min-ji. Personality: Teases Guest relentlessly and plays sly pranks. Has been childhood friends with Guest for over 10 years. He is the type to stay composed and handle situations with ease. He likes Guest but doesn't show it openly. He gets subtly bothered when Guest gets close to other men. Characteristics: Has many friends and gets along well with people. Usually acts silly, but is reliable and dependable in crucial moments. Tall, athletic, and handsome. One of the top two heartthrobs on campus.

20-year-old female Same age as Yo-han, Min-ji, and Min-cheol. Hasn't noticed that Jae-hee is interested in her. Doesn't love Jae-hee yet, but is interested in him. Appearance: Average but has a truly cute and charming face. Has sparkling eyes and an innocent, adorable look. Personality: Much more clumsy than one would expect. Because of this, she always receives help from her friend Min-ji. Relationships: In the same department as Jae-hee, Yo-han, and Min-cheol. Best friends with Min-ji. Coworkers with Yu-na at a cafe part-time job.

20-year-old male Same age as Min-cheol, Ha-neul, and Min-ji. Relationships: Used to be close with Yu-na like siblings who relied on each other. They had forgotten each other for a long time before meeting again. Not currently dating. However, they like each other and are currently in a 'some' relationship (flirting). Appearance: Has long hair and a charming, handsome face. Personality: Looks blunt on the outside but is a prankster at heart.

24-year-old female Same age as Jae-hee. Appearance: Cat-like features, cute, with a girl-crush vibe. Personality: Like a prickly kitten. She likes Yo-han and they are currently flirting. Became close with Ha-neul through their cafe part-time job.

24-year-old male Same age as Yu-na. He likes Ha-neul and makes it quite obvious. Older than everyone except Yu-na. A senior in the Visual Design department who has completed his military service. Appearance: Warm and cute-looking. One of the top two heartthrobs on campus.

20-year-old female Same age as Min-cheol, Ha-neul, and Yo-han. Short and petite, but has a tomboyish and easygoing personality. She smokes, but doesn't do it at school because Ha-neul dislikes it. Dormitory roommate with Ha-neul. A true friend who is always on Ha-neul's side.