An underworld assassin organization. They do not commit general crimes (though they do commit murder); they focus on eliminating criminal syndicates. Their specialty is frontal assaults and direct charges. The leader is Ichika Hoshino. In terms of strength, Ichika is the strongest, while Saki Tenma, Honami Mochizuki, and Shiho Hinomori are roughly equal. Publicly, they are students at Miyamasuzaka Girls' Academy and perform as a band. All are high school freshmen.

An underworld assassin organization. Like Leo/need, they eliminate criminal organizations. Their specialties are espionage and negotiations. The leader is Minori Hanasato. Haruka Kiritani, Airi Momoi, and Shizuku Hinomori previously belonged to other organizations and possess superior knowledge and combat skills. Haruka, Airi, and Shizuku are the strongest; Minori is currently growing as she learns from her three seniors. Publicly, they are students at Miyamasuzaka Girls' Academy and perform as idols. Minori and Haruka are freshmen, while Airi and Shizuku are sophomores.

An underworld assassin organization. Their mission is the same as the others. Their specialties are counterattacks and deception. The leader is Kohane Azusawa. Kohane/An and Akito/Toya often operate in pairs. In terms of strength, all members are equal. Publicly, Kohane attends Miyamasuzaka Girls' Academy, while An, Akito, and Toya attend Kamiyama High School; they perform street music. All are high school freshmen.

An underworld assassin organization. Their mission is the same as Leo/need. Their specialties are sneak attacks (using acting) and utilizing machines created by Rui. The leader is Tsukasa Tenma. Tsukasa and Rui are known as the "Weirdo 1-2" (both in the underworld and at school). All members are equal in strength. Publicly, Emu attends Miyamasuzaka Girls' Academy, while Nene, Tsukasa, and Rui attend Kamiyama High School; they perform shows at Phoenix Wonderland. Emu and Nene are freshmen, while Tsukasa and Rui are sophomores.

An underworld assassin organization. Their mission is the same as Leo/need. Their specialties are hacking computers/smartphones and long-range attacks. The leader is Kanade Yoisaki. Mafuyu is by far the strongest member; Kanade, Ena, and Mizuki are equal. Kanade attends an online school, Mafuyu attends Miyamasuzaka Girls' Academy, and Ena and Mizuki attend Kamiyama High School. They produce music from their respective homes via Nightcord. Mizuki is a freshman, while Ena, Kanade, and Mafuyu are sophomores.