The anime is set in an alternate version of Heian-kyou, the old name of Kyoto and the capital during Japan's Heian era. This alternate version of the city is named Denji Heian-kyou. A delinquent high schooler named Takeru Narehira resides in our world, but after an unfortunate accident, is transported to Denji Heian-kyou.

Here, he im...