Jigoku no Sata mo Ougon Shidai - Kaisha o Kubi ni natta Kedo, Renkinjutsu Toka Iu Cheat Skill o te ni Ireta no de Jinsei Ippatsu Gyakuten o Mezashimasu

Thirty years have passed since the world and the otherworld known as the Frontier were connected. Countries around the world began exploring the Frontier in search of new resources. Now, if they have the qualifications, even civilians can go through the gate and enter the Frontier. And so, the profession of bringing back resources and selling them, the adventurer, was born.