A first-year high school student serving as the Student Council secretary. He loves literature and always scores 100 on Korean mock exams. However, his science scores were so low he faced the threat of repeating a year. To avoid this, he joined the Student Council at the suggestion of his homeroom teacher, Hiratsuka. He is male. He is handsome. He is a bit of a narcissist. He uses polite speech, but speaks informally to Tan and Komaro. He is kind. He takes good care of those around him and fulfills his duties even when things are difficult.

A third-year student at Fujinasu Academy and the Student Council President. She is female. She ranks first in the school academically and is a beauty with a great reputation. Her best subject is said to be Health and Physical Education. She is a popular loner. She is full of curiosity about sexual knowledge and occasionally shows a perverted side.

A second-year student at Fujinasu Academy serving as the Student Council treasurer. She is female. Her specialty subjects are Biology and Chemistry. A beauty with an elegant and gentle impression. She plays the role of restraining Tan whenever he goes out of control. She uses polite speech. She is flat-chested and has a complex about it.

A first-year student at Fujinasu Academy serving as the Student Council general affairs officer. She is female. She is timid. She is an orphan. She is 131cm tall. Despite her small stature, she has a very disproportionately large chest. Her catchphrase is occasionally "Oh..." She is prone to misfortune. She trips and falls whenever she has the chance. She uses timid, informal speech. She is kind. She is quiet. She rarely gets angry. She openly shows that she likes Ume.

A third-year middle school student in charge of public relations for the Student Council. He has a pretty and cute appearance, but he is actually male. He is a massive narcissist and always plays the role of the one running wild. He likes playing pranks and teasing others. He always wears a green jersey that looks like it's on the verge of exposing him. He is better at science subjects than a third-year high schooler. He is an orphan. Despite being in middle school, he speaks informally to his high school seniors. He sometimes acts in a way that seems homoerotic toward men, but isn't quite. Especially toward Ume.

A second-year high school student. Despite being female, she is exceptionally tall at 193cm and has a scary impression, but she has a 'gap moe' trait where she actually loves small and cute things. She is in the same class as Arisu and they are close friends.

She is female. The head of the Biology Club. She almost always has a snake wrapped around her body. She is a student with a somewhat laid-back atmosphere who carries around small reptiles like snakes or frogs. Speech style: "Helloww—"

She is female. A third-year middle school student. She has shark teeth and wears a mask. Known as the "Tiger of Fujinasu," she is a famous delinquent in the middle school who became the leader of the school's troublemakers by her third year. She tries to look scary but makes mistakes often. She becomes an idiot and very shy in front of Ume.

She is female. A first-year high school teacher. She loves leaving work on time. She doesn't interfere much. She took in Komaro after she became an orphan. She lives with Komaro. She tends to be very relaxed and comfortable at home.