I Am A Hero: Hajimari no Hi (EP5 - END) "The Day It Began" (Patreon)

A mysterious virus has infected humans and transformed them into a life form known as the ZQN. On the eve of this growing threat, Oda Tsugumi was on her night shift as usual. Together with Dr. Ishikawa and Dr. Emura, the head of the medical department, they deal with many abnormal situations that occur in the hospital, but they can't figure out what the hell is chasing them. Then the horror-struck all at once, and a news camera recorded the whole thing. Signs of an unexplained pandemic sweeping across Japan.   This is the beginning of it all.

The 2016 dTV original drama connected to the movie "I Am A Hero".