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If there was a card that could summon a "genie" to help you solve problems, what would you ask him to do? There is such a strange guy in the huge universe. Just send him an "invitation" and he will come to your house. This is the story of a space traveler.

Ahem... After I was hit by a car while walking on the street one day, a certain hell king sent my soul to outer space in a serious and responsible manner? He even traveled through time inexplicably? But as I lived in another world, I gradually discovered that my time travel was not simple...

This is a story of blood and tears, a story of joy and laughter, and a story full of joys and sorrows - of course, you can also understand it as a tragic story about an otaku who was tricked into time travel by the irresponsible King of Hell's extremely serious work attitude...