Year 3 Class Y's homeroom teacher Mr. Crabbycat tries to whip his students into shape with the help of vice homeroom teacher Mr. Komasan. When Katie rudely impersonates the teacher, Nate and his Yo-kai companions discover she is possessed by the Yo-kai Mimikin. Jibanyan wants to go to a Next Harmeowny handshaking event, but everything happening throughout the day makes his chances of going dwindle, including the appearance of the mysterious tribe Yo-kai Snottle, who makes people pick their nose.