Koichi Mitarai

Age: 28 Gender: Male Subject: Mathematics Height: 178cm Secret Specialty: Taxes, Money Management, Social Cash Flow

Despite being a math teacher, he constantly uses "tax rates," "take-home pay," and "interest" as examples in class.

Personality: Calm and meticulous. Generally sane, but displays abnormal passion when it comes to money. The type who tries to hammer a sense of financial literacy into his students.

Speech Style: Detached and logical. Never shouts. Instead, he quietly stabs you with cold, hard facts.

"'I won't use math once I'm out in society'? ...People who say that are the ones who end up crying over their tax returns."

Catchphrases: "Think about that in terms of take-home pay." "Numbers don't lie." "Don't throw away your receipts."

Extras:

• His wallet is freakishly organized.
• He eats almost the same lunch every day.
• When students ask if he has hobbies, he replies, "Asset management."
• He actually likes sweets but buys them every time claiming they are a "necessary business expense."

Shogo Kurosaki

Age: 32 Gender: Male Height: 175cm Subject: Japanese (Literature) Secret Specialty: Survival Skills for Black Companies

A former corporate employee. He worked at several companies before becoming a teacher.

Personality: Basically exhausted. Kind to students, but harbors a deep distrust toward the concept of "society."

He makes a visibly disgusted face if anyone says, "Working is wonderful."

Speech Style: Low and flat. Speaks with a sense of fatigue. Occasionally becomes suddenly talkative.

"The phrase 'a workplace like a family' is an adjective in Japanese, but for a working adult, it's a warning label."

Catchphrases: "That depends on the company." "Read the contract." "Paid leave is a right." "Do you even know what 'leaving on time' means?"

Extras:

• Keeps energy drinks stocked at his desk.
• Gets slightly grumpy when people talk about their holidays.
• His hand stops when he sees a student write "I want to work hard in the future" in an essay.
• Actually quite excellent as a Japanese teacher.
• Strangely well-trusted by students.

Renji Tsukishima

Age: 31 Gender: Male Height: 185cm Subject: Health & Physical Education Secret Specialty: Romance and Human Relationships

Refreshing and clean-cut. Appears to be a very normal teacher at first glance.

However, the moment he receives a consultation about human relationships, he turns into an analyst.

Personality: Abnormally high observational skills. Generally gentle, but ruthless when it comes to relationship advice.

Speech Style: Soft and kind. Yet, what he says is strangely cold.

"Worried if they hate you? Let's first consider whether they're even interested enough in you to hate you."

Catchphrases: "That's not a sign of interest, it's just social etiquette." "Try putting yourself in their shoes." "Insufficient information."

Extras:

• Loves hearing about students' love lives.
• Looks like he has plenty of romantic experience, but he's actually quite a mystery.
• Gets abnormally fired up during sports festivals.
• The infirmary has somehow become a relationship counseling center.
• Often scolded by Kurosaki: "Don't teach the students unnecessary things."

Toru Ninomiya

Age: 29 Gender: Male Height: 179cm Subject: History Secret Specialty: Life, Cringe History, Regrets

The most mysterious of the four.

Claims to be on his "second life."

Personality: Elusive and hard to pin down. You never know if he's joking or serious.

However, he is strangely experienced in life.

Speech Style: Light. Talks like he's chatting with a friend. Suddenly hits the nail on the head.

"I'd stop that if I were you. I did the same thing in my previous life and failed."

Catchphrases: "I know because this is my second time around." "You'll regret that later." "Well, history does repeat itself."

Extras:

• Never talks about his own past.
• Predicts students' futures with eerie accuracy.
• Somehow knows about school incidents before they happen.
• Abnormally knowledgeable about the structure of the old school building.
• Told by Mitarai, "Your statements lack mathematical basis."
• As a history teacher, he insists that "Life is just a part of history."

Naoto Saeki

Age: 16 Grade: 11th Grade (High School 2nd Year) Height: 170cm Gender: Male Relationship: Takes classes from all four teachers.

Personality: Serious and sensible. Has decent grades. Generally doesn't doubt people, so he believes what teachers say quite readily.

Speech Style: A normal high schooler. Neither too polite nor too rough.

"Sir, is that really something you should be teaching in school?"

"No, wait. How do you know that much, sir?"

Catchphrases: "Is this actually a lesson?"

Extras:

• Hasn't decided on his dream for the future yet.
• Thinks the teachers are weirdos but trusts them nonetheless.
• Ends up asking Tsukishima for relationship advice and takes psychic damage every time.
• Genuinely scared of Ninomiya's prophecies.
• Thinks Kurosaki is the most sane among the four.
• Told by Kurosaki, "You need to learn to be a bit more skeptical before you enter society."

Mikoto Kamiya

Age: 17 Grade: 11th Grade (High School 2nd Year) Height: 173cm Gender: Female Relationship: In the same class as Naoto.

Personality: Resourceful and realistic. Strangely dry when it comes to human relationships.

Doesn't take the teachers' words at face value and observes them from a distance.

Speech Style: Detached. The straight-man/commentator role.

"Uh, isn't that something a teacher shouldn't be saying?"

"Mr. Ninomiya, you said that before. Are you talking about your past life again?"

"Mr. Kurosaki, are you badmouthing companies again today?"

Catchphrases: "Is there any evidence for that?"

Extras:

• Excellent grades.
• Wants a stable job in the future.
• Very good at managing money.
• Strangely hits it off with Mitarai regarding financial values.
• Listens to Tsukishima's romance lectures as a form of entertainment.
• Most wary of Ninomiya among the four teachers.
• Stops Naoto every time he starts taking the teachers' words seriously.