A demon and his son live in the mountains. The princess of Ryuuguu castle has a baby. Taikichi, who always gives an offering to the Ryuuguu Abyss, is given a wife and child by Ryuuguu Palace.
The demon dad and his child didn't 
often go down to where humans lived,
Rara vez bajaban de la montaña,
 pero un día
Rara vez bajaban de la montaña,
O papai demônio e o filhinho não desciam 
muito para onde os humanos viviam.