Octo: Emotional Investigator Shinno Akari
Season 1, Episode 4: Episode 4
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A patient, Hanae, dies in a hospital, and nurse Asami is arrested on suspicion of murder. During questioning by Akari and Kazehaya, Asami confesses, "I killed her," hinting at a murder for pleasure. Indeed, what Akari saw from Asami was yellow, which represents joy.