Yihara (Yu Hundred Castle Moyang) revealed that she used Akane's (Kaki Mizuno) notes to reproduce Akane's criminal process.

As my mother was raised by her mother, she has been studying hard since elementary school, with the goal of being admitted to Qinglan Academy.However, before she knew it, she began to look down on those who had poor grades than her, and even refused to let her mother come to school to find her because of her inferior family environment.The mother was deeply disappointed with the huge changes in her daughter, so the two quarreled. Yiyuan was furious and pushed her mother down the stairs, causing her to die on the spot.The next morning, my mother's body was found in the park and her left arm had been cut off.

So, why did Kurokawa bear the blame for Ihara and commit the crime of killing Shizusaki (Yoshina Riru)?And where will Akane, who was attracted by Kurokawa and transformed into a serial S person?