One day, an old man who had to go to another world through a dimensional gap during auto camp decided to create a childish animal ears at the end of numerous adventures. While being involved in various incidents, he held various events. A unique and different world life that unfolds while interacting with spirits, dragons, elves, dwarves, goblins, and various races . An all-you-can-eat cheat story that a rejuvenated old man wants to do. And the world was that of an "old man".