World view: Onmyoji + Heian Kyo + Inuyasha + Demon Slayer, etc.
Hoshino Seiya, the last descendant of the Hoshino clan.
His mother, Sakuraya Kami, had the power of omens, but died young. His father, Gennosuke Hoshino, was an onmyoji blessed by the gods. He signed a five-year contract with Tamamo-mae, and was raised by Tamamo-mae, Madara (the cat teacher), Goudori, and a bunch of Heian-kyo monsters.
After his fifteenth birthday, he went to Heian Kyoto to pay homage to Kamo Tadashi. At the same time, his senior brother was Abe Seimei, who was recognized as Rurihime in Hyakuki Nightwalk. She preferred living in the demon world to humans. She was Tamamo-mae's named treasure and the only indefinite contractor. She became friends with Sakurahime and witnessed her wedding to the general general of Hyakki Nightwalker, Nura Kaname, and gave her blessings.
Happiness is so short-lived. In order to balance the power in the world, a curse has come. Tamamo-mae refuses to give up hope and prepares to burn Kyoto to fight. Hoshino Seiya is willing to die in order to save Tamamo-mae and other monsters involved in this chaos.
At this point, the curse and chaos subsided for the time being.
The gods of Huangquan, Ara and Ichimokuren spent countless efforts and paid the price to make deals with the supreme gods to fish out the soul of Rurihime who fell into the chaos and nothingness. However, due to divine punishment and curse, Hoshino Seiya's body could not recover, so he was reincarnated in a new body.
The present world opens.
Intention: Always cherish the present moment
