Those evil and cruel people always have a fatal charm. Perhaps when the world falls apart, these people who are very different from ordinary people will be able to survive better.
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I am a surgeon. Before the world fell apart and the disaster happened, I thought I would live happily with my husband for the rest of my life. But when everyone began to change, when I couldn't accept it all and sat crying at the door of the hospital, he appeared. He seemed evil, cruel, and didn't care about the life or death of others, but I gradually became dependent on him, and I gradually became a person I didn't want to be.
The male protagonist who is ruthless and unscrupulous in order to survive × the female protagonist who is a surgeon (the female protagonist may not be perfect, but she will grow)
Apocalyptic novel, background zombies, no superpowers, realistic style
Concept: The contradiction between good and evil in human nature after the collapse of world order