Queen Mirela of Milwick summons one thousand humans into a gamelike fantasy world to serve her as slave soldiers. Bound by a powerful magic spell that allows her to kill them instantly if she so desires, the people from Earth soon realise that escape is impossible. Submission is the only way to survive. Marco, a courageous and idealistic 22-year-old university student, partners with Yui, a witty Japanese girl. Together, they face their new reality and its myriad otherworldly challenges head-on, hoping to regain their freedom. But in a world where disobedience means certain death, this will prove unimaginably tricky.