Yamato, whose only has outdoor hobbies was suddenly surrounded by a strong, blinding light while climbing, then was mysteriously transferred to a world with two moons. While puzzled, Yamato made “surviving” his most important task, and happened to encounter and help a girl being attacked by beasts. After going with her to her village, the villagers gave a meal and a night’s lodging to him, her benefactor, despite the extreme food shortage they were suffering. As thanks, Yamato decided to make use of his modern knowledge and the survival skills he cultivated in the outdoors, in order to save the village. Thanks to his “repayment” the village will develop to high specs, improving their weapons, opening fields for cultivation, and receiving the guidance of cultivation and hunting.