Popular games for collection Kaleidoscope of Phantasm Prison

A project penned by Ryukishi07 and illustrated by Inoue Itaru. The scriptwriter describes the story as "a terrifying tale of how these innocent cute girls will have everything taken from them with no mercy".

A reunion of old middle school friends in a room resembling something from an Alice in Wonderland world. With chains and collars around the girls' necks.