Tsurumi Asuta is 17 years old. He is a sophomore that serves as a journeyman in a place that was ruled by his father.
Once there was arson as someone wanted to possess Asuta’s father’s Japanese sword Santoku Houchou. The male ran to a building to take a valuable subject but died. When Tsurumi recognized it, he was in an unfamiliar place. A guy couldn’t observe the land as he was immediately attacked by a predator with tusks that looked like a wild swine. Fortunately, a maiden Ai Fa from the Morihen tribe rescued Tsuruma. When his sense came back, he had no doubt someone transferred him to another universe.