Mari is a female university student. She takes part in an experiment held by popular VTuber Sophia. When Mari arrives at the place where the experiment is to be held, she notices the place looks like a prison. 12 people participate in the experiment and they are assigned roles of prisoners and prison officers. The experiment takes place over 7 days. Mari is assigned the role of a prison officer. The experiment turns violent.
堀田真由
as Mari
Ken Nakajima
as Gure
岩井拳士朗
as Gete
Yûka Yano
as Gumi
芹澤興人
as Yamane
宇野祥平
as H
Mamiko Ito
as Kamiyama
立石晴香
as Getsuyo
岡部尚
as Renzu
Kanako Miyashita
as Jen
Chihiro Okamoto
as M16
Moeko Konno
as Meso
