Sorry, I'm not very good at writing copywriting. Anyway, it's mainly about a half-demon who was rejected by humans but not accepted by monsters. Later, he met Reiko and lost the bet, so he gave her his name. When time stopped, he fell asleep in a crystal coffin in a cave in Mount Kuri (made up randomly). When he woke up, he found that Reiko was dead. She found Reiko's grandson, Natsume Takaharu, and made Natsume Shikigami.