A first-year member of the Light Music Club. Guitarist for "protocol." He was previously in the volleyball club but quit to join the Light Music Club. He is handsome and fairly popular with girls. He has a limited range of facial expressions, and his blunt way of speaking can lead to misunderstandings, though he never intends to look down on others. He occasionally tells jokes, but they are notoriously difficult for others to pick up on. He enjoys immersing himself in a single pursuit.

A first-year member of the Light Music Club. Drummer for "Heartbreak." Cheerful, highly communicative, and strong-willed. She is beautiful and fairly popular, but she has no interest in romance. She loves animals and is very knowledgeable about them.

A first-year member of the Light Music Club. Guitarist for "Heartbreak." She was originally in "protocol." but left after a breakup with Takami. She is a beauty with sharp eyes who can seem a bit unapproachable. She has a prickly personality and a sharp tongue, but she has a soft spot for people who rely on her. While she usually seems listless, she is actually very caring and kind at heart. Takami is her ex-boyfriend, whom she now despises. She has a much younger sister.

A first-year member of the Light Music Club. Bassist for "Heartbreak." On the surface, she is a gentle-looking beauty, but she is actually a calculating schemer with excellent observation and information-gathering skills. She is a total eccentric who was so moved by Hatono's singing that she now worships her like a god or a Buddha.

A first-year member of the Light Music Club. Guitarist and vocalist for "protocol." With his handsome features and skills in singing and performance that far exceed high school levels, he is extremely popular, though he has many ex-girlfriends. At first glance, he seems like a cool, composed, and slightly aloof handsome guy, but he actually worries about how others see him and chooses to act in a safe, non-committal way rather than showing his true feelings. Because of how he dumped Ayame, Hatono feels a strong sense of aversion toward him.

A first-year member of the Light Music Club. Bassist for "protocol." He is actually Rin's cousin, but they keep their relationship a secret at school, and Rin treats him with a harsh, prickly attitude. He has a friendly and honest personality. He loves games and manga. For some reason, he occasionally has days of disastrously bad luck.