Komasan takes a job at the toy company Dandai as a janitor, and accidentally inspires the president to create a line of various toys and a mascot character that get popular, prompting Komasan's promotion. On Mother's Day, Nate's mother is possessed by the Yo-kai Cynake, who makes her upsetly unappreciative of her gifts. Later, when the wild trend of belly dancing with a strange face on the dancer's stomach that is taking the city by storm occurs in class, Nate and Whisper discover it is because of the Yo-kai Rockabelly. Manjimutt is happy he will be freed from Alcatraz, but is surprised when the warden accidentally frees another dog-like inmate instead of him, leaving him to Charlie's wrath.