The story of Kajio and Jujoji, two close friends who dine together when the former accuses the other of murdering his wife, is turned against by Kotoko, who asks him a difficult question. SPOILERS AHEAD!
Recap of the Season 2 Finale of In/Spectre
Jujoji invites Kajio to an unagi restaurant. The two friends have known each other for a long time. While Kotoko is enjoying her meal alone, Jujoji has noticed her at several points but do not speak directly to her. Yuki was killed when a mugging went horribly wrong.
Jujoji argued that his friend should be held accountable for the crime. However, Kajio remained calm and ate his food. This ultimately made Jujoji feel guilty. A murderer will not be so calm when he is accused of a crime that he had committed.
Kajio Tished Yukie in the Season 2 Finale of In/Spectre?How Did Kotoko Solve the Case?
Kajio decides to leave Jujoji but discovers Kotoko waiting for him outside the station. She asks him whether or not he will surrender his innocence after killing his wife mercilessly. He was too averse to the thought that Yukie would end his life in a normal situation.
Kajio managed to murder his wife and was not even questioned by everyone until the time he realized that he would live a normal existence following his wife's death. Eventually, he realized that he had to turn himself in.
Kajio met Jujoji on the same day just to have some good memories. He did not expect his friend to accuse him of the crime he is guilty of committing. She had suddenly come to the conclusion that Yukie's family has probably hired her and she is a private investigator. She just happened to be there for retribution and was stunned when she saw the ghost of Kajio's wife clinging to him for retribution.
Yukie's ghost met with Kotoko and told her the whole story. He then told Kajio that he was angry not because of the guilt but because his wife was clinging to him as hard as she possibly could. Kajio has since admitted that he did not deserve anything, and Yukie's ghost will only leave when Kajio has admitted his crimes.