After transmigrating into the world of a sword-and-magic civilization game he had played, Ruflai became the game's protagonist: the hero.
After drawing the Hero's Sword, gathering companions, and defeating the final boss, the Demon King, Ruflai suddenly returned to the starting point of his adventure, the day of the sword-drawing ceremony, with all his memories and strength intact.
Ruflai had planned to give up being a hero and enjoy his second life. Only then did he discover that invisible walls were everywhere, leaving him no way to move about freely.
And so Ruflai was doomed to repeat the cycle. He grew stronger with each loop and kept defeating the Demon King again and again. During his ninety-ninth loop, shortly before the sword-drawing ceremony began, Ruflai chased the village's big yellow dog and made it out of the village.
That meant the accursed invisible walls were gone.