G-Friend sings 'Letter Inside Pocket' for 'Pokémon the Movie: Volcanion and the Mechanical Marvel'
G-Friendhas released their OST for 'Pokémon the Movie: Volcanion and the Mechanical Marvel'!
The girls were chosen as the PR models for the movie. They not only sang "Letter Inside Pocket" but also filmed an MV for the song. You can see the teaser for the MVhere.