[Brief background intro]
Touhou Analepsia takes place a few years after the story in Touhou Gensokyo Warfare. Although the decay of magical power hasn’t stopped, Gensokyo entered a short golden age due to ‘her’ efforts: The previously divided Human Villages have been united; The Buddhists and Taoists ended their perpetual war and are looking for ways to coexist; Eientei is investing in its science technology; The Scarlet Empire is training its troops and getting fully prepared for the next war; The infighting between the different sub-factions in Youkai Mountain has quieted down. The Netherworld finally gets its first rest; The Underworld is singing and dancing to extol the good times, as usual. Gensokyo seems at peace, perhaps.
At the border of the Bamboo Forest of the Lost, rumors are spreading of the existence of “incredibly huge fortresses”; The Three Fairies left the Hakurei Shrine, seemingly planning for something, and the fairies are more restless than ever; Kijin Seija disappeared from the public eye, but rumors about her are spread in every taverns and village... Now, everyone seems convinced that war is but a thing of the past, but Tenshuokaku (fortified castles) are built in the Human Villages, the Scarlets continue investing in their armies, and the Eientei looks like a second Lunar Capital now... It is a false peace, it is a barrel filled to the brim with gunpowder. It seems obvious that a tiny spark would light a great flame.
However, nobody, not even the great sages and oracles could realize, that the tiny spark, would come from such an unexpected place...