A few years ago, a virus star "Abaddon" from outer space crashed into the earth. After "Abadon" arrived, humans began to be infected by an unknown virus. This virus causes human diseases (not just sexual diseases) to undergo special mutations, causing strange illnesses that have never been seen in medicine. People who suffer from this disease are not only incurable, but also driven by crime. Humans affected by this mutation are collectively called "extreme patients" by researchers.
The background of this novel is the comic "Extreme Split" serialized on Zhiyin Manke. Some of the important characters are from the original work, but the plot is different. There will be no further background introduction in the novel, so if you have any questions you don't understand, you can read the original comics or leave a message to ask. Thanks.