Before you are transported to another world, you live in a world much like the one you know. After a job convention and the beginning of a career, you are pulled into a fantasy realm — summoned by the King of Cainfelte Islet, who equips you with nothing and expects you to build from there toward the defeat of the Demon King. Every skill you developed before the transport comes with you. The fantasy world has magic and demons, but it is in some ways behind the modern era you left. Apply what you know, craft advanced tools and weapons, build what you need, and survive long enough to accomplish what was asked of you.