I'm looking for a zombie romance novel. What's the name?

The story began with a pair of cousins escaping from the zombies. They ran to the road and found a motorcycle in the grass to escape from their hometown. Along the way, a mutated old woman tied the protagonist to the bed and let the son who had turned into a zombie bite the protagonist. Then, she injected a serum to save her own son (using the serum left behind by a doctor, it was said that zombies could return to humans). The protagonist later mutated into a new human, killing zombies to level up and establish his own base...

Answer 1

One of the zombie romance novels was called Doomsday Blade. The novel told the story of a girl named Kate who became a bounty hunter after the apocalypse and protected humans with other bounty hunters. In the novel, Kate developed feelings for a bounty hunter, but their love could not continue for various reasons. The plot of this novel was full of ups and downs, and the characters were vivid. It was a very classic zombie romance novel.