Pareto's Miscalculation: Caseworker Murder Case

Satomi was provoked by the wife of Yamakawa. Satomi who realized the meaning learned the truth of Yamakawa's death. And, he tried to accuse himself, but it was a life-threatening action. Wakabayashi tries to save Satomi... How do you deal with the people who have encountered various difficulties and anguishes that you have met? What was Satomi's last discovery that she could do for the future?