Timeline

Until a calendar system is revealed in Grimgar, events will be labelled Before Arrival or After Arrival. Before Arrival for events that happened before Haruhiro's trainee group arrived in Grimgar and After Arrival for events that happened after Haruhiro's trainee group arrived in Grimgar.

Day 1

 * 12 teenagers, 8 boys and 4 girls, wake up in a dark room with no idea how they got there or who they were beyond their names.