Also called Time Prisoners, this is based on a Chinese webtoon by Bai Xiao. It's an alternative world where people researched and found the cure for a mysterious sleep-deprivation sickness where people became mad 60 years ago. Those people who were treated are now wearing a black collar who produces a dangerous side-effect: they become vampires. However, this story will take a more grave situation when these vampires/bloodivores start to be menaced by some mysterious Special Forces.

A case of insomnia swept across the globe. As a side effect of the drug developed to suppress this sickness of causes unknown, the "bloodivores" were born. Born from bloodivore and human parents, protagonist Mi Ryu was known as "The Child of Hope" tying bloodivore and humankind together. However, when Mi Ryu is arrested as the principal offender in a bank robbery, he is taken to a special prison operated by the Bureau of Special Threat Management for observing bloodivores.—Crunchyroll