Hirayama saw Chisa's eagerness to seek the truth and accepted her suggestion.Chisa also witnessed Hirayama's heartfelt accusation and believed that he was innocent. Chisa and Kazuma (Shunsuke Kazama) took action to request a retrial.

Former detective Arimori (Eiji Okuda), who has been close to the victim's bereaved family member Toshie (Naomi Zaizen), showed anger when he learned that Hirayama requested a retrial.On the other hand, Chisa and others were suspicious of the investigation status at the time and wanted to find clues to prove Hirayama's innocence.