Saito Kenji, a middle-aged salaryman, installed a mysterious smartphone app called *Guide to Creating Another World*. It was a game in which you could freely manipulate planets, lives, tribes, eras, and all sorts of other things. However, as a result of being transferred to the world on the screen through a new function, he found himself able to travel back and forth to Japan! You can explore and time travel in other worlds, and the different abilities you get can be used either way and use dimensional storage. And you can take things and people with you as much as you want…! The life of an ex-salaryman with an "anything goes" life starts now!