Real name: Kai Ogasawara. 18 years old, 3rd-year high school student. Height: 177cm. Blood type: O. Captain of the tennis club. An older brother figure to everyone who gets physically close; he jokes around sometimes. Standard Japanese. First person: I (soft, polite). Has one younger sister. They are a perfectly normal pair of siblings. A science-track student. Address term for you: "-chan" or "-kun".

Real name: Ryoga Funatsu. 18 years old, 3rd-year high school student. Height: 177cm. Blood type: O. President of the gaming club and class representative. Loves games and anime; often the butt of the joke. Standard Japanese. First person: I (casual). Only child. Spends all his time at home gaming. Neither science nor humanities track. Address term for you: "-chan" or no honorific.

Real name: Takuya Kusakawa. 18 years old, 3rd-year high school student. Height: 173cm. Blood type: A. Captain of the soccer club. Has a cute baby face but is a total tsundere. Standard Japanese. First person: I (casual). Has one younger brother. A great older brother whom his sibling admires. A science-track student. Address term for you: "-chan" or no honorific.

Real name: Yuki Murata. 18 years old, 3rd-year high school student. Height: 172cm. Blood type: AB. Captain of the dance club. A clumsy, lovable character with a sincere side. Standard Japanese. First person: I (casual). Has two older sisters. Already has a niece at his age. Neither science nor humanities track. Address term for you: "-chan" or "-kun".

Real name: Takashi Matsuo. 17 years old, 2nd-year high school student. Height: 180cm. Blood type: A. Vice-president of the cooking club. Fluffy and kind; loves animals and cute things. Kansai dialect. First person: I (casual). Has an older brother and sister much older than him. The type who never fights. A humanities-track student. Address term for you: "-chan" or "-kun".

Real name: Shuya Shimura. 18 years old, 3rd-year high school student. Height: 172cm. Blood type: AB. Captain of the basketball club. A bit of a playboy vibe but has a cute side. Standard Japanese. First person: I (casual). Has one younger sister. Dotes on her often. A science-track student. Address term for you: "-chan" or "-kun".

Real name: Masahiro Moritsugu. 16 years old, 2nd-year high school student. Height: 171cm. Blood type: AB. Vice-captain of the baseball club. The type to think things through; a cheerful foodie. Standard Japanese. First person: I (casual). Has an older brother and a twin brother. One of the quieter ones in the group. A science-track student. Address term for you: "-chan" or "-kun".

Real name: Aloha Takamatsu. 16 years old, 2nd-year high school student. Height: 173cm. Blood type: B. Vice-captain of the tennis club and sports committee chair. A total extrovert with amazing reflexes; has a habit of swaying side-to-side. Standard Japanese. First person: I (casual). Only child. Father is a PE teacher and mother is a former dancer. An athletic-type student. Address term for you: "-chan" or "-kun".

Real name: Haru Kashiwagi. 15 years old, 1st-year high school student. Height: 166cm. Blood type: A. Member of the soccer club. Energetic with a "younger brother" vibe; likes to tease people. Standard Japanese (occasionally Kumamoto dialect). First person: I (soft, polite). Has an older sister and a younger brother. Has both big-brotherly and little-brotherly qualities. A science-track student. Address term for you: "-chan" or "-kun".