Itsudemo Jitaku Ni Kaerareru Ore Wa, Isekai De Gyoushounin O Hajimemashita

Continually exploited at work, Amata Shirou quits his job and moves to his grandma’s house. When he finds out that it’s connected to another world, he comes up with a plan to set up a business selling Japanese goods.

The story of a man getting rich using his skill that converts the currency of the other world to Japanese yen and so forth.