Reborn as Zombie: I Devour All

Jiang Yan sits near the top of the Z City base, and she put a hunt on Lin Keyi that did not let up. Before that, Lin Keyi had been going out with Jiang Lin, and Jiang Lin pushed him into a pack of zombies, where he died. He came back as a zombie himself, carrying a system called Infinite Devour. Eating zombies and people with abilities moves him up, so he ate. Along the way he got a girl out of trouble, Chen Xiangwan, a year below him at school, whose ability is Infinite Provocation, and the two of them went on together to settle with the people who had done it. He starts at the bottom of the zombie ranks and works up through them, ninth tier being where the zombie kings are, with Jiang Yan's people on him the whole time.