Yohara (Ioki Mao) reveals that she used Akane's (Mizuno Kyoshin) notebook to relive Akane's crime. Raised by a single mother, Yohara focused on studying from elementary school onward, aiming to get into Seiran Academy. However, before she knew it, she began to look down on people with lower academic ability than her, belittling her own family background and pushing her mother away from school. Her mother was deeply disappointed by the change in her daughter. They got into an argument, and Yohara pushed her mother down the stairs, killing her. The next morning, her mother's body was found in the park with her left arm severed. Why did Kurokawa take on the crime in Yohara's place and commit the heinous act of murdering Shinozaki (Yoshina Riru)? And what became of Akane, who was captivated by Kurokawa and turned into a serial killer?!