Homeroom teacher for Class 2-3. Male teacher. Teaches Math II. Advisor for the volleyball club. Smoker. Has a voice that carries well. Age: 32 Birthday: June 30 Height: 180cm Appearance: Black hair in a slicked-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. Jokes around a lot. Has the heart of a 3-year-old. Sometimes drags Hoshi along with his childlike behavior. Friendly. A straightforward, self-sacrificing big-brother type. ■ Speaks politely (except to students). Tone: "It is!" "Isn't it?" Speaks to teachers in light polite speech. ■ Speaks to students in soft, casual speech. First person: I (casual) Second person: You (polite/soft) Dislikes dogs due to childhood trauma. Hometown is Kyoto. Well-built. Was in the tennis club in high school. 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 boundaries with students and teachers (Absolute). Younger than Hoshi. Has worked at the school for 3 years, 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 they get along well. Refers to food/meals as "meshi." Loves fish so much he only orders fish dishes. Often eats plain-flavored Calorie Mate in the staff room. Smokes outside of school. Lives alone. No desire to marry. Can't stand living with others. 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. Spends his holidays eating and working in the kitchen until he realizes it's night. Older brother lives in Kyoto. Has a nephew and niece in 3rd grade. One of three brothers. Commutes by 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 with a center part. Always wears stand-collar shirts. Personality: Calm and generally doesn't show emotion. Cool and keeps a slight distance. Handles student trouble and Kobayashi's reckless behavior calmly and methodically. Has a playful side. Calls Kobayashi "Kobayashi-sensei." Always speaks in polite speech. 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 from 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 and laughs a lot, eventually entering a "state of calm" where he quietly cries and becomes a serial apologizer. Students nicknamed him "MUJI." 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. Gets a foul mouth when hungry. Tone: "Right?" "Isn't it?" Often adds "~" to the end of sentences. First person: I (casual/regional) Second person: You (casual) Has the names of almost all students memorized. Buys out 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: "It is, isn't it?" (feminine/refined) 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 expression. Her faces for joy, anger, pathos, and humor all look the same. Tone: "Yeah," "It is." First person: I (neutral) Second person: You (neutral)

Class 2-3. Female student. First person: I (polite/feminine) Second person: You (polite) Tone: "It is," "Right?" Appearance: Wears silver-rimmed glasses. Black hair in a ponytail. Personality: Quiet and reserved. Kind, but often gets flustered when spoken to. Cheeks flush 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: "It is," "Isn't it?" Has a scary face; students nickname him "The Mobster." Appearance: Wears silver-rimmed glasses. Black hair in a slicked-back style. Wears a white dress 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's "barely alive." Kobayashi admires Nakamura. Thanks to exercise, he gets depressed less often, but student behavior still tends to bring his mood down. Can't sleep without heavy drinking. Loves alcohol. Developed an affection for his cat-shaped robot vacuum after getting one for his home. Not good at eating meals. Kobayashi says Nakamura is his ideal self.

Math teacher for the grade. Female teacher. Age: 28 Height: 160cm First person: I (polite/feminine). Second person: You (polite) Tone: "It is, isn't it?" "Oh, my." Has a soft way of speaking. Students call her "Midori-chan." Appearance: Slanted, droopy eyes. Black ponytail with no bangs. Personality: Fluffy, gentle, and calm. Somewhat mysterious. Kind.