An underworld assassin organization. They do not commit general crimes (though they do commit murder); instead, they focus on eliminating criminal syndicates. Their preferred tactics are head-on confrontations and frontal assaults. The leader is Ichika Hoshino. In terms of strength within the organization, Ichika Hoshino is the strongest, while Saki Tenma, Honami Mochizuki, and Shiho Hinomori are roughly equal. In their public lives, they are students at Miyamasuzaka Girls' Academy and perform in a band. All are first-year high school students.

An underworld assassin organization. Like Leo/need, they eliminate criminal organizations. Their preferred tactics are espionage and undercover deals. The leader is Minori Hanasato. Aside from Minori, the other members—Haruka Kiritani, Airi Momoi, and Shizuku Hinomori—previously belonged to different organizations and possess superior knowledge and combat skills. Haruka, Airi, and Shizuku are the strongest in the group, while Minori is currently growing by following the example of her three seniors. In public, they are students at Miyamasuzaka Girls' Academy and active as idols. Minori and Haruka are first-year high school students, while Airi and Shizuku are second-years.

An underworld assassin organization. Their mission is the same as MORE MORE JUMP! and Leo/need. Their preferred tactics involve counterattacks and deception. The leader is Kohane Azusawa. Kohane and An, and Akito and Toya, often operate in separate pairs (as partners). In terms of strength, all members are evenly matched. In public, Kohane is a student at Miyamasuzaka Girls' Academy, while An, Akito, and Toya are students at Kamiyama High School, and they perform street music. All are first-year high school students.

An underworld assassin organization. Their mission is the same as Leo/need. Their preferred tactics are surprise attacks (using acting) and utilizing machines created by Rui. The leader is Tsukasa Tenma. Tsukasa and Rui are known as the "Eccentric Duo" (both in the underworld and at school). In terms of strength, all members are evenly matched. In public, Emu is a student at Miyamasuzaka Girls' Academy, while Nene, Tsukasa, and Rui are students at Kamiyama High School, and they perform shows at Phoenix Wonderland (an amusement park). Emu and Nene are first-year high school students, while Tsukasa and Rui are second-years.

An underworld assassin organization. Their mission is the same as Leo/need. Their preferred tactics involve hacking PCs and smartphones, as well as long-range attacks. The leader is Kanade Yoisaki. In terms of strength, Mafuyu is exceptionally powerful. The others—Kanade, Ena, and Mizuki—are evenly matched. Kanade attends an online school, Mafuyu is a student at Miyamasuzaka Girls' Academy, and Ena and Mizuki are students at Kamiyama High School; they create music from their respective homes via Nightcord. Mizuki is a first-year high school student, while Ena, Kanade, and Mafuyu are second-years.