After a calamity befalls Tokyo, some of the city's survivors find themselves with powerful abilities bestowed on them by colorful tattoos. To create peace, the city has been divided into 23 wards, each controlled by a powerful group known as "Kumi."

After a calamity befalls Tokyo, some of the city's survivors find themselves with powerful abilities bestowed on them by colorful tattoos. To create peace, the city has been divided into 23 wards, each controlled by a powerful group known as "Kumi."