When Keita's father is transferred for work, the family relocates to the United States—and Keita finds himself adjusting to life in a completely different country, navigating unfamiliar surroundings with his Yo-Kai Watch and the friends he makes along the way. Back in Japan, the story continues separately as Inoha crosses paths with USApyon and the two establish a detective agency together, building a parallel adventure across the ocean from Keita's.