A Hero is Sent to a Different World and Became a Businessman?

In the world of superpower, a man named Seiko lives. A big incident happens in his life. But somehow he was transported to another world. He lost his power and gained a new life. Due to certain circumstances, he became a businessman. Hello, this is the author. I'm sorry in advance for grammatical errors and other problems in the writing. Please forgive me and if you want to waste time then you can point out the problems. I hope you read it. The name and the synopsis are only eligible to relate to the first few arcs.  Thank you for reading the synopsis and I hope you will like this story.