The main character, a gambling addict, had a heart attack due to the shock of winning the lottery one day. He was reincarnated in a different world, a casino, where he was called the owner. The protagonist has become a manager who controls a number of dealers. Since he was well versed in modern gambling and cheating, he used his knowledge to become a warrior in the other world.

"I'm not sure if there are any female customers...yes."

The protagonist tries to remodel the casino with an idea that did not exist in the other world. The idea is not just gambling, but erotic gambling targeting the female customers who come to the casino...!