From the anime: The Grandson of the Slippery Ghost is a juvenile comic with monsters as the theme. Taking modern Japan (Ukiyoe Town) as the stage, it depicts the daily weird fantasies of people and monsters. The story of a boy who inherits the commander-in-chief of Hyakki Yakou and persuades evil and punishes evil in the world of monsters Hyakki Yakou. Most of the monsters in the story come from the monster painting collections of Toriyama Sekien's "Illustrations of a Hundred Ghosts at Night" and Takehara Harusen's "One Hundred Stories for Little People". ?Character in "The Grandson of the Slippery Ghost". A boy of mixed race between humans and monsters, he usually wears glasses and has short hair. When he was a child, he got along with the ghosts and dreamed of becoming a slippery ghost. After witnessing the "true face" of the monsters, he gave up this dream and instead wanted to become a great human being. Possessing a quarter of youkai blood makes Rikuo human during the day and youkai at night. His father died young and his mother and grandmother were both human. The monsters of the Nuliang tribe all call him "Young Master".