Shinobu Kocho, the Insect Hashira renowned for her calm, rational nature and mastery of poisons, hides a wound no one knows about: a deep-seated hatred of demons, born from the killer who murdered her parents when she was a child. She swings her blade to slay demons and hides her pain behind a smile, a dependable companion in the eyes of her fellow Corps members.
But no one knows that each night, she becomes a being wearing a bizarre demon mask, hunting down the very comrades she has sworn to protect. By day, she remembers nothing of her nighttime rampages. As her teammates die one after another, her hatred of demons grows ever more frenzied.
When the truth pierces her disguise like a poisoned barb, she discovers that she herself was the one who killed her parents as a child. Every comrade who died in the night fell by her own hand. A demon’s bloodline had long lain dormant within her, destroying everything she held dear in the very way she hated most.
The moment she regains her senses brings the ultimate collision between reason and madness. Bearing the burden of two sins, Shinobu Kocho will finally end the bloody tragedy she herself set in motion, in the most resolute way possible, before everyone’s eyes.
