Aoi searches the grocery store run by Ide, a serial murderer who surrendered.There was enough evidence to prove Ide's crime.During the investigation, Ide confessed to all crimes.
Although Aoi and Ide are high school classmates, they can't think of anything to do with him.
The serial murderer's motive is believed to be his obsession with Aoi, but the reason for his obsession with Aoi is unknown.
Aoi began to investigate Ide and asked him about the reason for his obsession with her.
On the other hand, Kosaka and his son Jun hunt down the escaped Arimura.Arimura and Jun are hiding somewhere….
Ide stated the details of the incident, but his obsession with Aoi was incomprehensible.Then, Kasaka began to investigate Ide.Ide suddenly came up with a puzzle, which confused Aoi, Kasaka and the others.