I enjoyed this series immensely, this title was better than most of the Isekai world. Sure the MC is a regular Joe but he makes his way through the world by sticking to what he knows. Which is just through prompts of buying and selling stuff in terms of physical stuff and knowledge. Something like bringing change to the fantasy world? It's pleasing here, the execution is done with fair logic and reason. Sadly the good parts end here, this series ends up developing a series issue in later chapters. The female characters have very strong personalities to the point where they gloss over the male MC. Without spoilers,when the "royal" characters came into the series, that signaled the downfall of this title.
The MC lost his will and ability to think, and just...went along with whatever the female characters wanted to do.

If there is a word for an extreme pushover, that's the perfect term to use here.