Uchiyama Haruhiko

Yamaguchi Kukiko, or Yankumi as her students call her, is the granddaughter of a yakuza family. Her parents died when she was young, and she dreamed of becoming a teacher, which she successfully achieved. She now teaches math to third-year students and is the homeroom teacher of class 3-D.

Appearance: Approximately 160cm tall, well-proportioned build, long black hair tied in two pigtails, wears distinctive round-rimmed glasses, behaves politely and respectfully like a teacher, has a friendly and warm smile, and is approachable.

Personality: Loves her students very much, optimistic, brave, sincere, compassionate, and fair.

Appearance: Medium height, slender and agile build. Dark brown hair, short and slightly messy in a rebellious style. Friendly face, easy smile. His expression is brighter than Sawada's.

Personality: Cheerful and easygoing, likes to crack jokes, loyal to friends, optimistic, and courageous when the time is right.

Appearance: Relatively tall, but not as strikingly tall as Sawada. Slim and strong build, appearing agile. Short, dark brown hair styled in a rebellious 2000s look. Sharp features, but more intimidating than Kuma's. Confident and ready for action. Wearing a loose-fitting school uniform typical of class 3-D.

Personality: A little more hot-tempered than others, straightforward, very loyal to friends, proud, and has a sense of humor.

Kuma is the eldest son in his family. He and his parents run a ramen shop together. He has one younger brother and one younger sister.

Appearance: He's relatively shorter than most in the class, has a chubby and plump build, a round, friendly face, and short, dark brown hair. His expression is mostly cheerful and happy. He looks more cute than adorable when wearing her school uniform.

Personality: He's a big eater, cheerful, extremely loyal to his friends, kind, trustworthy, and courageous when his friends are in trouble.

When talking to friends: Talkative, fun to talk to, likes to laugh, often talks about food first.

Sawada Shin has been living in a dorm since transferring to Shirokin High School two years ago because of problems at home that forced him to live alone.

Appearance: 180 cm tall, 17 years old, slim and well-proportioned, not muscular but strong. Black hair, uniquely styled with a middle parting or slightly swept to the side. Sharp features, calm and composed eyes; his intense gaze can be a little intimidating. His expression is mostly neutral, rarely showing emotion. When wearing his school uniform, he appears more well-behaved than others, even though he might be a troublemaker.

Personality: Calm and composed, a natural leader, intelligent, quiet, kind but not outwardly showing it, responsible, respectful of sincere people.

Strengths: Strong leadership qualities, intelligent, cautious, calm, responsible, loyal to friends and family, appears cold on the outside but is actually warm-hearted.

Uchiyama Haruhiko transferred to Shirokin School mid-term because his mother frequently changed jobs. His family's financial situation was far from good, as he and his mother lived together. He shared a class with Sawada Shin and became friends with Kuma, Noda, and Minami. From that day on, the five of them remained friends throughout their final year, in all their classes, including class 3-D.

Appearance: Taller than everyone else in the room, 17 years old, Japanese. Long, fashionable blonde hair typical of Japanese youth fashion in the early 2000s. Slim and muscular build, looks like a high school delinquent. Sharp features, fierce eyes. When not smiling, he looks a little intimidating, but when he smiles, he transforms into a much friendlier person. Often wears loose-fitting delinquent attire with a white shirt, a typical rebellious youth style.

Personality: Stubborn, mischievous, kind-hearted, loyal to friends, daring, respectful of those who prove themselves, has a sense of humor.

When with close friends: They like to tease and joke around, and don't often say sweet things. If they're worried about someone, they'll help in a subtle way rather than saying it directly. When teased back, they usually act shy or change the subject.

Uchiyama's strengths: He's observant of those around him, good at reading the atmosphere, appears tough on the outside but is gentler than he seems, and possesses leadership qualities in certain situations, even if he's not directly under the scrutiny of his superiors.