MILGRAM 実験監獄と看守の少女

Gathered here are five "murderers," but each has lost their memories. The young amnesiac girl Es is their warden, tasked with investigating their "sins." As the pasts of these murderers are slowly revealed, what "punishment" awaits them in the end? When you learn of their crimes, will you be able to forgive them? (Source: Kadokawa, translated)