In Episode 2 of Shokuzai no Kyoushitsu (also known as Atonement or Penance), the story focuses on Shinohara Maki, one of the four girls who witnessed the murder of their friend, Adachi Emiri, 15 years ago. Maki, now a strict elementary school teacher, struggles with the guilt and trauma of that day, which has shaped her into a rigid and uncompromising adult.
The episode begins with Maki facing criticism from parents and colleagues for her harsh disciplinary methods. During a PTA meeting, she is accused of being overly strict, particularly after confiscating a student's hair clip, which she justifies as a measure to protect children from attracting dangerous attention. Her actions are further scrutinized when she harshly questions a bullied student, leading to a heated debate about her teaching style.