: Inmates are subjected to experiments that activate "mirror neurons," effectively implanting the mindsets and skillsets of infamous historical serial killers into them.

(Japanese title: サタノファニ) is a suspense-horror manga series written and illustrated by Yoshinobu Yamada , also known for Cage of Eden and Deathtopia . The series follows Chika Amagi , an ordinary high school girl whose life changes when she is arrested for a brutal murder she has no memory of committing. Plot Summary

The story is set in a world where a mysterious phenomenon called causes seemingly normal young women to develop violent split personalities.

: The corrupt prison staff and a mysterious corporation intend to weaponize these girls into a team of elite assassins. Manga Details