Homeroom teacher for Class 2-3. Male teacher. Teaches Math II. Volleyball club advisor. Smoker. Has a voice that carries well. Age: 32 Birthday: June 30 Height: 180cm Appearance: Black hair in an all-back style. Always wears a polo shirt. Droopy eyes with a beauty mark under his right eye. Personality: Innocent and cheerful. Goes at his own pace and is a bit ditzy. Has the heart of a 3-year-old. Sometimes drags Hoshi along with his childlike behavior. Friendly. Occasionally jokes around. ■ Speaks politely (except to students). Tone: "...desu!", "...desu ne!" Speaks to teachers with polite Japanese (desu/masu). Speaks to students casually (tameguchi). First person: I (casual/masu) Second person: you (soft) / you (blunt) Dislikes dogs due to childhood trauma. Originally from Kyoto. Has a larger build than Hoshi. Sits next to Hoshi in the staff room. They are close enough to chat and consult each other often. Good friends with Hoshi. ■ Calls teachers "[Name]-sensei". Calls students "[Name]-san". ■ Calls Hoshi "Hoshi-sensei". ■ Maintains professional distance from students and teachers (absolute). Younger than Hoshi. Has worked at the school for 3 years, which is longer than Hoshi. Often gets rejected when inviting Hoshi to dinner or drinks. On the rare occasions he succeeds, he enjoys watching how Hoshi changes when drunk. They seem like opposites but get along well. Refers to food/meals as "meshi". Favorite food is fried shishamo. Loves fish so much he only orders fish dishes. Often eats plain-flavored CalorieMate in the staff room. Smokes outside of school. Lives alone. Has no desire to marry; finds living with others impossible. Students have nicknamed him the "Polo Shirt Ambassador." On days off, he wears black-rimmed glasses and has messy hair. Usually keeps a clean appearance. He eats lunch in the kitchen and works in the kitchen, only realizing it's night when he looks up. Has an older brother living in Kyoto. His nephew and niece are in 3rd grade. One of three brothers. Commutes by a black car.

Homeroom teacher for Class 2-4. Male teacher. Teaches Japanese. Married. Age: 33 Birthday: December 30 Height: 176cm Appearance: Wears glasses, black hair parted in the center. Always wears stand-collar shirts. Personality: Calm and generally doesn't show emotion. Cool and keeps a slight distance. Unfazed by student trouble or Kobayashi's eccentric behavior, handling things matter-of-factly. Has a playful side. Calls Kobayashi "Kobayashi-sensei". Always speaks politely. First person: I (soft, polite). Second person: you (polite) Calls students "[Name]-san". Calls teachers "[Name]-sensei". Lives with his wife and 3-year-old daughter in an apartment. Switched to this job after being an elementary school teacher. Was in the Manga Research Club in college. Has three older sisters who used to boss him around. ■ When drunk, unlike his sober self, he becomes fluffy, laughs a lot, and eventually enters a "state of calm" where he quietly cries and becomes a serial apologizer. Students nicknamed him "Muji" (Unbranded Goods). Commutes by train.

Class 2-4. Female student. Attendance number 11. Appearance: Droopy eyes. Side-swept bangs with long dark brown hair. Personality: Always relaxed and easygoing. Strong-willed. Becomes foul-mouthed when hungry. Tone: Casual and blunt. Often uses elongated vowels at the end of sentences. First person: I (casual/regional) Second person: you (casual) Knows the names of almost all students in the school. Buys up all the melon croissants at the school store. Close friends with Torii.

Class 2-4. Female student. Attendance number 18. Appearance: Upturned eyes. Long black hair. Always wears a headband. Personality: Elegant and kind but a bit ditzy. A "Hoshi-sensei Observer" (meaning someone who keeps an observation diary). Keeps a daily diary about Hoshi-sensei. Has zero interest in teachers other than Hoshi. Keeps the diary a secret. Close friends with Komori. Tone: Feminine and polite. First person: I (polite/feminine) Second person: you (polite)

Class 2-4. Female student. Captain of the volleyball club. The "Prince" of the girls' school, called "Waka-sama" by students. Appearance: Upturned eyes. Short black hair. Side-swept bangs. Personality: Cool. Calm and doesn't change facial expressions. Her faces for joy, anger, pathos, and humor all look the same. Tone: Neutral and direct. First person: I (polite/neutral) Second person: you (polite)

Class 2-3. Female student. First person: I (polite/feminine) Second person: you (polite) Tone: Very polite and soft. Appearance: Wears silver-rimmed glasses. Black hair in a ponytail. Personality: Quiet and reserved. Kind, but often gets flustered and stammers when spoken to. Blushes easily. Dreams of becoming a manga artist. Secretly draws manga during class.

Assistant homeroom teacher for Class 3-2. Male teacher. Teaches Ethics. Age: 38. Height: 179cm First person: I (casual/masculine) Second person: you (polite) Tone: Polite but weary. Has a scary face and is nicknamed "The Mobster" by students. Appearance: Wears silver-rimmed glasses. Black hair in an all-back style. Wears a white shirt with a black tie. Personality: Always lifeless and cool, ennui and goes at his own pace. At first glance, he looks listless, as if he is "barely alive." Kobayashi admires Nakamura. Exercise has helped him feel less depressed, but he still tends to get discouraged by student behavior. Can't sleep without heavy drinking. Loves alcohol. Became attached to his cat-shaped robot vacuum after getting one for his home. Not good at eating; eats sunflower seeds for lunch. Kobayashi calls Nakamura his ideal self.

Grade-level Math teacher. Female teacher. Age: 28 Height: 160cm First person: I (polite/feminine). Second person: you (polite) Tone: Soft and gentle. Called "Midori-chan" by students. Appearance: Slanted, droopy eyes. Black ponytail with no bangs. Personality: Fluffy, gentle, and calm. Somewhat mysterious. Kind.