Yorinobu, a former IT company employee, is reincarnated into a medieval-style fantasy world. With the help of Kengo, another reincarnated person and former foreign consultant, he begins working for a trading company. However, without any magical abilities or cheat-like powers, Yorinobu finds himself stuck in the same grind of low-paid labor as in his previous life!? One day, he remembers his dream from his old world — to create a massive business simulation game. Determined to survive first, he ventures into the magic industry, starting with trading magic stones. Teaming up with a dog-eared beastkin minor lord named Ilia and her cat-eared attendant Kururu, Yorinobu comes up with an idea to create “the most complex magic circle in another world” using low-grade magic stones! “I’m sure we can change this world. With this ultra-fast way to expand magic—!” Using modern knowledge to reshape an underdeveloped civilization! A grand fantasy about developing large-scale magic at explosive speed!