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Long Yu, an office worker, died suddenly at his workplace due to continuous overtime work and traveled to the world of Takebayashi Ryoma. Later, like his younger brother Takebayashi Ryoma, he died of a burst blood vessel due to overwork. With the help of the gods, he returned to his twelve years old and was sent to another world by the gods. He founded the Tianyu Chamber of Commerce in the second year after arriving in the other world.

The protagonist accidentally traveled to the Ultra World because of saving someone from a fire.