A seventy-year-old photograph reveals the truth.
Season: 1
Determination
Shinpei hears about Shide's identity from Sou's father, Director of Hishigata Clinic.
To Be/Not to Be
Shinpei finds himself in Hizuru's memories from fourteen years ago.
Into the Darkness
Shinpei gains clues on Mount Takanosu since Ushio and her shadow had gone there.