The Legacy of Dr. Death: Black File (2020)

A series of suspicious death cases take place. All the victims were terminal patients. Detective Hayato Inukai and Detective Asuka Takachiho investigate the case. Through their investigation, they learn of a person known as "Dr. Death." He performs euthanasia by request. Meanwhile, Detective Hayato Inukai’s daughter Sayaka requests the help of Dr. Death. Sayaka suffers from a severe kidney disease.