異世界に放置ゲー理論を持ち込んだら世界最強になれる説 (Associated Names)

One day, a middle-aged man who unexpectedly reincarnates into another world ponders an idea. An idle game. In the busy modern society, it is a game system that allows one to easily and quickly become strong. But what if this game theory were to be brought into another world? This is a story about a…