The Shadows of Who We Once Were Vol. 3 (Kodansha, 2022)

During the 52 hours of human experimentation that drew out the weak and ugly sides of humanity, the first day comes and goes, leaving the students and teacher in a sleepless night to the second day. Between the growing bonds and deepening discord, the simple but cruel truths behind their time as children are uncovered. Those who are needed will be chosen, those who are unnecessary will be cut off. A terrifying reality awaits for the arrogant masses as they question who is deemed worthy and who is to be abandoned.