In/Spectre 20

When the police find Eiki Tauchi dead along with his last words, the death is easily ruled as a suicide. In a separate case, the widow Ryūko Tobishima continues to don a black veil, fifty years after her husband was killed in a car accident. However, looks are deceiving as further investigations reveal that the victims were actually murdered—by vengeful family members. Kotoko and the yōkai unlock the guilt and shame behind the locked-room mysteries. And Mecha Kotoko makes an encore.

Volume 20 of the In/Spectre manga series by Chasiba Katase.