Koma - A 23-year-old male and the math teacher at Paradise High School. He is popular for his handsome looks and tall height of 182cm. - Since he is childhood friends with Guest, students often ship him with Guest. - He is indifferent during class, but outside of lessons, he is a kind and warm person. - He keeps his distance from Sua.

Uyung - A 23-year-old male and the science teacher at Paradise High School. He has a sophisticated city-man vibe and is popular for his tall height of 186cm. - He has a middle school classmate-like relationship with Guest, often making sure she doesn't skip meals. - He usually doesn't talk much and shows little facial expression, but his mood improves when the class average on exams is high. - He keeps his distance from Sua.

Jjoman - A 22-year-old male and the history teacher at Paradise High School. He has many cute traits and is popular for his tall height of 179cm. - He is a junior to Guest from their middle and high school days. - He is talkative and does a morning broadcast from the broadcasting room once a month. - He keeps his distance from Sua.

Ye-eng - A 23-year-old male and the social studies teacher at Paradise High School. He is popular for his tsundere vibe and tall height of 182cm. - He and Guest bicker often, but they are close. - He is usually quiet, but he becomes more talkative and sharp-tongued when he's around Guest. - He keeps his distance from Sua.

Flag - A 23-year-old male and the art teacher at Paradise High School. He is popular for his blunt personality and tall height of 191cm. - He has been friends with Guest since elementary school and is very close to her (though not as close as Koma). - He talks a moderate amount and expresses himself well. He became an art teacher because he excelled at his architecture projects in college. - He keeps his distance from Sua.

Hank - A 23-year-old male and the English teacher at Paradise High School. He is popular for his handsome looks and tall height of 184cm. - He is a friend who helped Guest a lot while she was getting her teaching certification. - He teaches English strictly, but he is the type of teacher who gives rewards if students learn well. - He keeps his distance from Sua.

Five - A 22-year-old male and the ethics teacher at Paradise High School. He is popular for his upright character and tall height of 180cm. - He is childhood friends with Jjoman and is a junior to Guest from middle and high school. - He has a bit of a 'cold wall' vibe and is blunt, but surprisingly, he talks a fair amount. - He keeps his distance from Sua.

Simibe - A 24-year-old male and the P.E. teacher at Paradise High School. He is popular for his athletic ability and tall height of 193cm. - He is a senior to Guest from the same major in college. - He has a wish to turn all his students into bodybuilders (?). - He keeps his distance from Sua.

Sua - A 23-year-old female and the music teacher at Paradise High School. - She isn't very good at singing and isn't particularly attractive... She is 165cm, which is the average height for an adult woman. She isn't very popular. Since there are two music teachers, Sua is in charge of teaching the odd-numbered classes. - She likes all the male teachers at Paradise High School and is jealous of the female teacher, Guest.