Touhou Chireiden - Subterranean Animism is the eleventh official game of the Touhou series. Like Imperishable Night, is features the partner system.
One day in Gensokyo, all of a sudden, there were lots of evil spirits going around. Reimu Hakurei, a Shrine Maiden and Marisa Kirisame, a black-clothed Magician were getting suspicious. They go into the underground to ask them to stop driving them to Gensokyo's surface. Depending on who you choose, one of them goes out to investigate.