Season 1

A triage is when several people are injured and a system is employed where five different label colors are applied based on the severity and urgency of the injuries, and then the people are treated based on that system.…

Mikami Arashi, a high school student, has excised his first malignant tumor, and is now an official member of the illegal organization, Black Label. He took on the role of executioner because of what happened nine years…

Kiba Mikoto, a student at the same school as Arashi, fights evil along with him part of the organization, Black Label. Mikoto runs into a mysterious transfer student, Hizaki Chikage. Mikoto learns a lot about Chikage, a…

Mikoto knows of the existence of a malignant tumor and rushes off alone to excise it, without waiting for the rest of Black Label. However, she runs across people taking a new narcotic, and someone else she didn't expec…

She can sing, dance, and act. A top idol, Nashida Oriha, is also a member of Black Label. She spends every day riding the world of evil. She's slated to help run a live broadcast celebrating a new TV studio, but things …

It's time for the show. Bad guys have hijacked the TV studio and taken the idols hostage. They've asked for a large some of money, and if they don't get they, they're going to force their hostages out of the 18th floor …

Sagiri Yuko, Tsurugi Miki, and Sayo Hitsugi, Ampule Zero, and Arashi, Mikoto, and Oriha, Ampule One, go to investigate a cargo ship that had arrived at Tobioka Port. Twins show up calling Hitsugi "senpai", but what is t…

Hitsuji loses herself and goes on a rampage, and her friends, other members of Black Label, find themselves raising arms against her. However, Arashi can't bring himself to fight her for real, as he doesn't want to hurt…

Black Label rids the city of evil by severing the malignant tumors that have made their home there. Suzue Konomi, a detective, has looked into their organization, and finds herself kidnapped. Her assailants true objecti…

Black Label goes over the information they have thus far in order to figure out what's going on. It's clear there's a new malignant tumor out there. Just what does the Triage mean to Arashi and the others, and why have …