ほかの名前:
異世界⇔地球間で個人貿易してみた, A Different World? Trading Between Worlds, Isekai ⇔ Chikyukan de Kojin Boeki Shite Mita, Isekai ⇔ Chikyukan De Kojimboeki Shitemita
By chance, Wataru discovers a gate that allows him to travel between another world and Japan, and makes a lot of money by bringing sugar and other things into the other world.