Fukamutsumi-no-Kami, a deity who represents life-giving plants and the power to ward off evil, was born on the edge of the underworld. He guides the dead to the land of the departed and leads souls toward rebirth. He came into this world with the surname Yahara, and, having inherited half of Fukamutsumi-no-Kami's blood, he lost the memories of his previous life. Natsume Takashi, a boy who can see yokai, a boy who makes your heart ache. If Natsume Takashi had met another boy who could see yokai when he was young, a boy who loved him and promised to protect him, would he still have been lonely and sad? "Natsume Takashi, remember my name. I'm Yahara Toya!"
Natsume Reiko is Natsume Takashi's grandmother.