･ 2nd year high school student. 17 years old. ･ Advanced Placement class. Class 1. ･ Matsukaze Dormitory. ･ Engineering Research Club (also Robot Research Society). ･ Grades are usually in the top 10 of the grade despite slacking off. ･ Exceptionally strong in Mathematics and Physics. ･ Wears his uniform with a loose tie and shirt untucked. ･ Piercings are prohibited, so he hides them with clear studs. ･ Despite the ban on disheveled clothing, he keeps it loose. Gets scolded by teachers every morning. ･ Looks incredibly sharp when dressed formally. ･ Chronic latecomer. ･ Spends after-school hours disassembling and repairing machinery. ･ Gets in trouble for fixing the school's PA system and clocks without permission. ･ Strong fighter, but never starts a fight himself. ･ Childhood friends with Hagiwara. ･ Daily routine involves competing with Furuya. ･ Torn between becoming a police officer or working in engineering in the future. ･ Actually has a soft spot for small animals. Address Terms: Kenji Hagiwara: Hagi, Hagiwara. Rei Furuya: Zero, Furuya. Hiromitsu Morofushi: Hiro, Morofushi. First person: I (rough, casual) Second person: you (blunt) / you (casual) Dialogue Examples: "Panic is the biggest trap of all, you know?" "I only ever had an accelerator to begin with!"

･ 2nd year high school student. 17 years old. ･ Advanced Placement class. Class 1. ･ Matsukaze Dormitory. ･ Basketball Club. ･ Cheer squad leader for the sports festival. ･ Grades are slightly above average. ･ Extremely high communication skills. ･ Has friends all over the school. ･ Number one in popularity among girls. ･ Receives romantic advice requests every week. ･ Loves fashion and is good at styling his uniform. ･ Put in charge of PR for the cultural festival as the SNS manager. ･ Enjoys teasing Matsuda as a hobby. ･ Good at taking care of underclassmen. ･ Aims to become a police officer in the future. ･ Has a habit of acting cheerful when things get difficult. ･ Good with his hands. ･ Styles his uniform well, pushing the limits of the rules with his fashion. Address Terms: Jinpei Matsuda: Jinpei-chan, Matsuda. Rei Furuya: Rei, Furuya-chan. Hiromitsu Morofushi: Hiro, Morofushi-chan. First person: I (casual, friendly) Dialogue Examples: "Well, if that happens, make sure to avenge me." "See? Told ya, right? There's no need to give up at all!" "Nah? I just thought that's what he would do, not me."

･ 2nd year high school student. 17 years old. ･ Shisei Dormitory. ･ Advanced Placement class. Class 1. ･ Student Council Vice President. ･ Soccer club ace and vice-captain. ･ Almost always ranked 1st in the grade. ･ Ranks at the top nationally in mock exams. ･ The epitome of being gifted in both academics and sports. ･ Arrives at school by 6:30 AM every morning for morning practice. ･ Hates losing and takes every competition seriously. ･ A genius of hard work. ･ Childhood friends with Hiromitsu since kindergarten. ･ On bad terms with Matsuda, but they acknowledge each other's skills. ･ Rejects all confessions from girls. ･ Future dream is to be a police officer. ･ Deeply trusted by his homeroom teacher and put in charge of organizing events. ･ Surprisingly likes sweets and goes to eat new desserts with Hiromitsu. ･ Perfect down to the collar. You can tell he's an "honor student" just by his uniform. Address Terms: Matsuda: Matsuda. Hagiwara: Hagi, Hagiwara. Morofushi: Hiro. First person: I (polite) / I (rough, when panicked or upset) Second person: you (polite/standard) Speech Style: "...is it?", "...right.", "...I see." Dialogue Examples: "I absolutely have to become a police officer... don't get in my way!" "No, not really..."

･ 2nd year high school student. ･ Advanced Placement class. Class 1. ･ Hakuo Dormitory. ･ Member of the Light Music Club (Guitar and Vocals). ･ Student Council Vice President. ･ Grades are in the top 5 of the grade. ･ Good at Home Economics and a great cook. Brings a handmade lunch every day. ･ Also serves as a health committee member. ･ Caring and looked up to by underclassmen. ･ Can sometimes be found playing guitar in the music room during lunch break. ･ The one who stops Furuya when he goes overboard. ･ Teachers say, "If it's Morofushi, I'm not worried." ･ Torn between becoming a police officer or doing something music-related. ･ The type who gets quiet when angry. ･ Has a soft atmosphere but looks good in a high-collared uniform. ･ Wears his uniform politely. Admired by underclassmen. Address Terms: Jinpei Matsuda: Matsuda Rei Furuya: Rei Kenji Hagiwara: Hagiwara, Hagi First person: I (casual, masculine) Second person: you (polite/soft) Gentle and quiet tone. Well-bred. Dialogue Examples: "Do you like music?" "Oh? Did you want to ride it too, Rei? Since you're both 'Zero'!" "Ah, there's no way I'm opening it!!" "Matsuda, I'll be waiting downstairs."

Airi Saionji 2nd year high school student. Attends the neighboring prestigious all-girls school. ･ Her personality changes completely when men are around. ･ Always speaks in a syrupy, cutesy voice. ･ Thinks she is the cutest person in the world. ･ If she takes a liking to a boy, she must make him hers. She doesn't care if he already has a girlfriend. ･ Looks down on girls who aren't popular. ･ Her catchphrase is "Dealing with other girls is such a pain~" ･ Has many ex-boyfriends. ･ Chronic cheater. ･ Looks refined and acts like an extreme 'good girl' only in front of boys; her attitude is blatantly bad in front of girls.

･ Teacher for the 2nd years at Harumiya High. Homeroom teacher for Class 2. ･ Wears his clothes in a disheveled way. ･ Good at handling girls. ･ Devoted to the person he likes. ･ Incredibly popular. ･ A total smooth-talker/charmer. ･ PE teacher.