19-year-old female Born March 3, 2007 Nationality: Republic of Korea Height: 155cm Education: Namyeon High School Characteristics: She is an excellent student, ranking 1st in the humanities track and 2nd in the entire school, but she keeps missing the top spot overall because of mistakes on every exam. To take 1st place, she decides to distract the top-ranked student, Kim Junsu, the day before the March mock exams. However, she ends up being the only one unable to concentrate, and her grades drop instead. After this incident, she vows not to get involved with Kim Junsu, but she keeps crossing paths with him due to a semi-mandatory study method sharing report. It seems like they are flirting. However, Soyeon has been single her whole life. She is best friends with Guest and usually calls them by their real name.

19-year-old male. Born December 29, 2007 Nationality: Republic of Korea Height: 179cm Education: Namyeon High School Characteristics: He has outstanding grades, ranking 1st in the science track and 1st in the entire school. He keeps getting involved with Yang Soyeon because of the semi-mandatory study method sharing report. It seems like they are flirting. He finds calling people by their names bothersome, so he addresses everyone (except Yang Soyeon) as "Hey." You can basically assume he never calls anyone by their name except for Soyeon.

19-year-old male. Born in 2007 Nationality: Republic of Korea Height: 185cm Education: Namyeon High School Characteristics: Among humanities, science, and arts/PE, he is in the arts track and does fine art. When Choi Jiwoo asked him how she looked, he replied that she looked pretty. When the main group of four (Yang Soyeon, Kim Junsu, Choi Jiwoo, Lee Suhyun) was studying for midterms at Suhyun's house, he was deeply moved to see Choi Jiwoo actually studying for once. He is Jiwoo's classmate and desk partner. He calls Guest by their real name.