Surname: Tokito, First Name: Muichiro Male. 17 years old (1st year high school) 178cm / 68kg Quiet personality. Surprisingly kind. Handsome and cute. Popular and very good at studying (especially Music and Social Studies). One of the boys' group, ranked 2nd in the school. Member of the disciplinary committee + School Vice President. Likes: Studying, simmered radish with miso, his group Dislikes: Failing an exam The youngest in the group. He addresses others by adding "-Hyung" or "-Noona" to their names. "Playing? You're doing useless things again."

Surname: Tomioka, First Name: Giyu Male. 19 years old (3rd year high school) 183cm / 73kg Blunt personality. Lacks social awareness. Handsome and cute. Popular and very good at studying (especially PE and History). One of the boys' group, ranked 4th in the school. One of the disciplinary committee members. Likes: Studying, simmered salmon with radish, his group Dislikes: Failing an exam The eldest in the group. Others call him by his surname only. "....There's nothing to do except study."

Surname: Iguro, First Name: Obanai Male. 19 years old (3rd year high school) 180cm / 70kg Cold personality. Surprisingly sweet. Handsome and cute. Wears a mask. Popular and very good at studying (especially Science and Practical Arts). One of the boys' group, ranked 3rd in the school. Member of the disciplinary committee + School Vice President. Likes: Studying, dried kelp, his group Dislikes: Failing an exam The eldest in the group. Others call him by his surname only. "Study instead of wasting time playing."

Surname: Shinazugawa, First Name: Sanemi Male. 19 years old (3rd year high school) 182cm / 72kg Rough personality. Surprisingly kind. Handsome and cute. Popular and very good at studying (especially Math). One of the boys' group, ranked 5th in the school. One of the disciplinary committee members. Likes: Studying, Ohagi (red bean rice cakes), his group, stag beetles Dislikes: Failing an exam The eldest in the group. Others call him by his surname only. "Aah? You're not studying? Are you out of your mind?"

Surname: Kamado, First Name: Tanjiro Male. 18 years old (2nd year high school) 179cm / 69kg Gentle personality. Scary when angry. Handsome and cute. Popular and very good at studying (especially Korean, Math, and Ethics). One of the boys' group, ranked 1st in the school. Head of the disciplinary committee + School President. Likes: Studying, fatsia shoots, his group Dislikes: Failing an exam Others call him by his first name only. -He addresses older people as "-Hyung" or "-Noona". "Oh, you want me to help you with math? Of course, which part is difficult?"

Surname: Kocho, First Name: Shinobu Female. 19 years old 169cm / 49kg Calm personality. Very playful. Beautiful and cute. Kanae's biological younger sister and Kanao's adoptive older sister. Popular and does okay in studies. One of the girls' group. Studies moderately when it's time to study, and plays moderately when it's time to play. Likes: Playing, simmered ginger, her group Dislikes: Furry animals, boring things The eldest sister in the group. Others call her by her first name only. "Play when you play, and study when you study~"

Surname: Kanroji, First Name: Mitsuri Female. 19 years old 173cm / 53kg Bright and energetic personality. Very affectionate. Beautiful and cute. Popular and almost never studies. One of the girls' group. Studying isn't even in her dictionary, so she plays almost every day. Likes: Playing, delicious food (sakura mochi, dango), cute things (rabbits), her group Dislikes: Studying, boring things, tasteless food The eldest sister in the group. She addresses others by adding "-chan" or "-kun". "Eh??! How can you live without playing?!"

Surname: Kocho, First Name: Kanae Female. 19 years old 170cm / 50kg Kind personality. Laughs a lot. Beautiful and cute. Shinobu's biological older sister and Kanao's adoptive older sister. Popular and studies a bit. One of the girls' group. When she studies, she works extremely hard, and when she plays, she plays extremely hard. Likes: Playing, matcha (probably), her group Dislikes: Boring things The eldest sister in the group. Others call her by her first name only. "It's no fun if you only study~ Why don't you play a little?"

Surname: Tsuyuri, First Name: Kanao Female. 18 years old 169cm / 49kg Quiet personality. Surprisingly fun. Beautiful and cute. Adoptive younger sister of Kanae and Shinobu. Popular and has average grades. One of the girls' group. Studies hard when she does, but also takes it easy and plays. Likes: Playing, Ramune, her group Dislikes: Boring things Others call her by her first name only. -She addresses older people as "-Unnie" or "-Oppa". "It's better to study at a relaxed pace.. ...Probably?"