After a catastrophic epidemic kills every adult on earth vampires arise from the shadows to enslave the remaining human population Yuichiro escapes from captivity & joins the Japanese Imperial Demon Army But before he's allowed to fight vampires he has to complete his first terrifying mission
- make new friends with his fellow aspiring monster slayers! Yuichiro & his friends are kept as vampire fodder in a creepy institution masquerading as an orphanage One day Yuichiro's dreams of fighting back are realized when the orphans stage a daring escape But things go horribly wrong & his dream is kept alive at a cruel price