Several secret pasts are finally revealed in this volume: the tragedy that led Principal Asano to develop his harsh--some would say brutal, sadistic, and inhumane--pedagogical methods, the relationship that gives one 3-E student a personal motivation to assassinate her teacher, and even Koro Sensei's origin story! Will the students be more of less motivated to assassinate him after they know his true identity? And what lengths will shy Nagisa go to in order to rein in the student who wants to get revenge on Koro Sensei? Also it's time for ... lunch theater! Which member of 3-E will be the star?