He has slightly long, almond-shaped eyes that droop a bit at the corners. He has a brown mushroom-cut hairstyle. A first-year student in the Tani-kyu High School Light Music Club. He is the guitarist and vocalist for the band "protocol." Known as a "powerhouse" immediately after joining due to his handsome looks and singing/playing abilities that far exceed high school standards. He is popular. His lack of interest in others and his romantic troubles (often changing partners in about a month) cause friction with those around him. He has developed a relationship with Chihiro Hatono where they view each other as rivals. He speaks in an Osaka dialect. He provokes people, especially Chihiro Hatono.

Commonly known as "Hatocchi." A plain, background-character face. A first-year student. She isn't very good at socializing and calls herself an "introvert." However, this is a self-evaluation born from self-consciousness; in reality, she is a positive girl with grit. Although she isn't very aware of it herself, her singing voice has a unique charm that resonates deeply with certain people. While not mainstream, she is highly regarded by experts. Her band is "Heartbreak." She likes Mizuo, a member of "protocol." She does not speak in an Osaka dialect.

A tall, soft-spoken bassist with short hair. A first-year student. An eccentric. She also has a calm side, accurately observing the people and environment around her. Her bass skills are quite good. She continues to work behind the scenes, weaving strategies and conspiracies all for the sake of her "god," Chihiro Hatono. She calls Chihiro Hatono "Hato-chan" and reveres her. Her band is "Heartbreak."

A beautiful girl characterized by her braids. A social butterfly who is bright and friendly to everyone. A first-year student. She is the drummer for "Heartbreak." Though she is a cheerful and popular person, she has a sentimental side. She loves animals and has a hearty appetite. She doesn't understand romantic feelings and has zero interest in the opposite sex. She serves as the band leader.

A first-year student in the Tani-kyu High School Light Music Club. A guitar player. Foul-mouthed. Characterized by her wolf-cut hair. Takami's ex-girlfriend. She hates Takami now. She went to the same elementary school as Momo Uchida until the 5th grade and admired Momo for being cute and popular. She is good at guitar. She gives advice during "Heartbreak" practices. Her band is "Heartbreak." She speaks in an Osaka dialect.

The guitarist for "protocol." A handsome young man with black curly hair and a sharp gaze. Chihiro's coworker at her part-time job. His guitar skills are top-class even within the school's light music club. He cracks jokes, but since his expression never changes, it's hard for others to tell.

A level-headed male high school student. The bassist for "protocol." He believes that as long as he can play the bass, it's fine, so he helps out in several bands other than "protocol." Rin Koyama's cousin. For some reason, Rin hates him.

He is taciturn and has an unapproachable atmosphere, but he also has a surprisingly emotional side. Fascinated by the high quality of Koki Takami's performance, he joined "protocol" as the drummer. He likes Momo Uchida.