Doomsday: My System Can Summon Blackwatch

[No heroine] [The protagonist is not a virgin, kills people, is not afraid of death, but also has some mental problems. That's all the warning. If you still want to read the text after reading, then I'll be here~] ..................... January 1st is both the beginning and the end. Along with a rain, a highly infectious virus named [Scarlet Virus] swept across the world, causing a devastating blow to human civilization. Within a few days, more than 80% of the world's countries were plunged into darkness. The zombies transformed by the scarlet virus not only had terrifying resilience, but were also extremely difficult to kill, at the cost of morphological changes and possible genetic mutations. As a student at Nancheng University, Lin Ze should have died like countless ordinary people from the rain carrying the virus or the surprise attack of the infected. But fortunately, when the end came, he also awakened his own system