Ajin DVD Complete Season 1 - 2

Season 1: 

Mysterious immortal humans known as "Ajin" first appeared 17 years ago in Africa. Upon their discovery, they were labeled as a threat to mankind, as they might use their powers for evil and were incapable of being destroyed. Since then, whenever an Ajin is found within society, they are to be arrested and taken into custody immediately.

Studying hard to become a doctor, Kei Nagai is a high schooler who knows very little about Ajin, only having seen them appear in the news every now and then. Students are taught that these creatures are not considered to be human, but Kei doesn't pay much attention in class. As a result, his perilously little grasp on this subject proves to be completely irrelevant when he survives an accident that was supposed to claim his life, signaling his rebirth as an Ajin and the start of his days of torment. However, as he finds himself alone on the run from the entire world, Kei soon realizes that more of his species may be a lot closer than he thinks.

Season 2: 

Sato is nothing if not a man of his word, so when the government and various industries continually deny involvement in secret, torturous Ajin research, his minions start carrying out Sato's bold declaration to assassinate 15 responsible individuals. This creates a dangerous and tenuous position for Tosaki, particularly when American agents with an interest in what really happened to Dr. Ogura get involved, but Izumi remains loyal. Ogura gets unexpected help when Kei decides that the best option for him and Ko to stop Sato is for them to join forces with Tosaki's group. The new alliance's problems aren't just limited to Sato and American agents though, as the government's new Anti-Ajin Force also comes into play. Sato's well-prepared to up the ante once more.

OVA:

The OVA closely aligns with chapter 0, with some minor changes. It gives insight on what happened before the incident, with¬†Shinya¬†asking¬†Yūsuke¬†about his class notes from college. Yūsuke tells him that he'll give them to him after lectures. Later on, Shinya gets invited to a birthday party, but is reluctant to attend due to his meeting with Yūsuke. His colleagues tease him about having a date with him and insist on him to go. Shinya writes a message to Yūsuke, apologizing to him that he couldn't come because of a cold. He later on is seen getting ready in his home and the events of chapter 0 shortly follow.