Onmyo Kaiten Re:verse

A high school delinquent named Takeru Narehira is transported to an alternate version of Heian-kyou, known as Denji Heian-kyou, following an accident. There, he meets Tsukimiya, a woman familiar from his dreams. Shortly after, they face an oni monster and die. Takeru awakens again in Denji Heian-kyou, realizing he can travel back in time. He decides to learn the mystical onmyōjutsu techniques of this world and train as an onmyōji sorcerer to save Tsukimiya.