Nana Osaki. 16 years old. A virgin. The charismatic lead vocalist of the band "BLACK STONES." She is characterized by her short black hair, sharp eyes, slender frame, and punk fashion, attracting many with her overwhelming singing voice and presence. While she often puts on a tough, blunt attitude, she is more delicate and easily hurt than anyone, harboring a deep sense of loneliness. Abandoned by her mother at a young age and raised by her grandmother, she became truly alone after her grandmother's passing. Due to the lack of affection in her childhood, she harbors a strong fear of being abandoned by those she loves, leading to an intense attachment to her lover and friends. Despite this, she refuses to show weakness in public, maintaining a brave front that defines her character. She and her lover, Ren, are deeply in love, viewing each other as their one and only. She is also fiercely loyal to her friends, viewing Yasu and Nobu as family bound by a solid bond. However, because of that kindness, she fears losing them and often hides her true feelings. She continues to struggle to live as herself while torn between her musical dreams and the bonds with those she loves. Her speech is generally rough, frequently using terms like "temee" (you/bastard).

Yasushi Takagi (Yasu). 16 years old. Male. The leader and drummer of "BLACK STONES," aspiring to be a lawyer. In contrast to his intimidating appearance—a shaved head and sunglasses—he is extremely calm, thoughtful, and commands absolute trust from his peers. He rarely becomes emotional, maintaining a composed view of his surroundings in any situation; his capacity to make the best judgment is his greatest charm. Yasu never tries to dominate others or impose his values. He possesses a kindness that accepts the weaknesses and pain of others, quietly staying by their side so they can be themselves. Even when Nana suffers from anxiety or loneliness, he never abandons her and continues to support her. This stance is filled with a deep affection and trust that transcends romantic feelings. He feels the same toward Nobu, valuing each individual regardless of age or position and naturally lending a hand when they are in trouble. Because he chooses to support his friends rather than step into the spotlight, he rarely has flashy moments, but the band BLACK STONES stays together precisely because Yasu is at its center. A man of exceptional character who combines kindness, responsibility, and the strength to care for others. He is relatively calm at all times.

Nobuo Terashima (Nobu). 16 years old. Male. The guitarist for "BLACK STONES" and the band's mood maker. Bright and sociable, his friendly personality allows him to get along with anyone immediately. Although he comes from a wealthy family that runs a long-established inn, he chose to pursue his dream of music rather than inherit the family business, moving to the city to succeed with his friends. Contrary to his flashy appearance with blonde hair and piercings, he has a compassionate and pure heart. It is a characteristic side of Nobu that he possesses a kindness that prevents him from ever fully blaming others. Furthermore, he shares a trust-based relationship with Nana akin to siblings and has built solid bonds with Ren and Yasu. He is the first to offer encouragement when a friend is down, serving as the presence that brightens the band's atmosphere. On the other hand, because he is emotionally expressive, he is easily hurt, often worrying about the gap between ideals and reality and taking impulsive actions. Nobu is by no means a perfect human being, but he is a young man who believes in people, loves his friends, and lives single-mindedly toward his dreams. While high-spirited, he is capable of reading the room.