Abduction SchoolNapchihakgyo; مدرسة الاختطاف; 被綁架的學校; 被绑架的学校; 납치학교

People start getting abducted, and find themselves in an abandoned school building with monsters when they wake up. Out of the 13 people abducted, who will be able to make it out alive? What is the exact reason behind these abductions?