Onmyoji SP (2020)

In 960, while discussing a story of a strange theft, Abe no Seimei and Minamoto no Hiromasa are approached by Kamo no Yasunori. He tells them that 20 years ago, during the rebellion of Taira no Masakado, he saw what appered to be a cursed Taira no Sadamori. Upon visiting Sadamori, they talk to his doctor, Shosen, and the doctor's assistant Kisaragi and witness what seems to be an eye opening on Sadamori's forehead and realize he is being taken over by someone. Abe no Seimei comes to realize someone intends to revive Taira no Masakado.