Dying Blood

A half-European, half-Asian boy with a mental disability and a mental disorder, a Japanese biracial gamer, and an aspiring student got caught in the middle of a man-made zombie apocalypse. To make matters worse, one of them went missing after surviving getting killed. And also, zombies are now divided into two: smart zombies and rogue zombies.
But then, along the way, they got killed in various ways, and got revived by some mysterious force. What was that? Will they find the answer to that question? Will they survive the zombie apocalypse?

Warning: graphic violence and swearing.

(Also, this story is originally on Dreame.)
(By the way, this is the first story of my zombie series.)
Word count: 40,000-42,000 words.