Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy is a 2017 puzzle video game by Level-5. It is the seventh main entry in the Professor Layton series and follows a new protagonist Katrielle Layton. It was released for Android iOS and the Nintendo 3DS in 2017 and an enhanced port for the Nintendo Switch in Japan in 2018 and worldwide in 2019. A manga adaptation of the game drawn by Hori Oritoka began serialization on March 20 2018 in Shogakukan's Ciao magazine and an anime adaptation Layton Mystery Tanteisha: Katori no Nazotoki File began airing on Fuji TV and other channels in April 2018.