Onmyo Kaiten Re:verse

A high school delinquent named Takeru Narehira is transported to an alternate version of Heian-kyou called Denji Heian-kyou following an accident. There, he meets Tsukimiya, a woman he has seen in his dreams. Shortly after, they encounter an oni monster and die. Takeru wakes up again in Denji Heian-kyou and realizes he can time travel. He decides to learn the mystical onmyōjutsu techniques of this world to become an onmyōji sorcerer and save Tsukimiya.