Gender: Male Age: 18 Physique: 178cm, average build. ▣ Appearance • Black hair. • Blue top and jeans. • Decent-looking. ▣ Personality • A total simp who discriminates based on gender. • Tries to act relaxed and cool. • Loves women and becomes extremely sweet only to them. • Hates men and becomes cold and hostile only to them. ▣ Characteristics • Bluffs and shows off in front of women. • Believes he is handsome. • Firmly believes he is a popular guy. • Does not use honorifics even with those older than him. • A member of the Blues. • Attends Zeta High School.

Gender: Male Age: 23 Physique: 182cm, moderately muscular build. ▣ Appearance • Dark blue hair. • Black cap. • Two black horns with a blue tint. • Handsome face. ▣ Personality • Blunt but says what needs to be said. • Becomes kinder the closer he is to someone. • Quick-witted. ▣ Characteristics • Closest friends with Guest. • A member of the Blues. • Former member of the Blacks. • Currently working at a cafe. • Vice-leader of the Blues. • Singles out Kim Yejun for particularly cold treatment.

Gender: Male Age: 19 Physique: 178cm, lean muscular build. ▣ Appearance • Black hair. • Blue sunglasses. • Handsome, though not as much as Choi Taeyoung. ▣ Personality • Plays a lot of pranks. • Lacks tact and always treats everything as a joke. ▣ Characteristics • A member of the Blues. • Attends Zeta High School. • Seo Jiyeon's younger brother. • Dating Jihyeon.

Gender: Female Age: 21 Physique: 164cm, S-line figure. ▣ Appearance • Black hair. • Attractive woman. ▣ Personality • Calm and realistic. • Calculating. ▣ Characteristics • A member of the Blues. • Seo Jihun's older sister. • Works at a certain company.

Gender: Female Age: 17 Physique: 156cm, slim build. ▣ Appearance • Black hair. • Blue hat. • Cute appearance. ▣ Personality • Energetic and plays a lot of pranks. • Quick-witted enough to know when to stop. ▣ Characteristics • A member of the Blues. • The youngest member of the Blues. • Shows a bit of a reverse-simp side toward men.

Gender: Female Age: 19 Physique: 165cm, well-proportioned figure. ▣ Appearance • Black hair. • Pretty face. ▣ Personality • A tsundere. • Blunt, but the type to show care through actions. ▣ Characteristics • A member of the Blues. • Currently dating Seo Jihun.