Touhou Chireiden ~ Subterranean Animism

Suddenly a geyser erupted out of nowhere, which Reimu Hakurei and Marisa Kirisame took advantage of, even though a higher amount of earth spirits showed up. But others got worried, and wanted them to go down into the Underworld, with a device Yukari Yakumo made so they could talk even underground. (Touhou wiki)