Touhou Spell Carnival Story
Gensokyo — A remote land isolated from the Outside World, where humans and youkai live side-by-side. 

One day, the shrine maiden of Hakurei Shrine, Reimu Hakurei, spots mysterious pillars towering over various locations throughout Gensokyo. 

These pillars signaled the start of the Spell Carnival, a festival hosted by Yukari Yakumo where one must put their Spell Cards on the line in battle.