You're exploring the underground of Gensokyo. Going deep enough, you could feel the environment getting warmer and warmer. Without doubt, you are currently somewhere in the former Hell of Blazing Fires.

Ignoring how it keeps getting hotter, you keep trotting down. Without warning, something blows up ahead, as a girl flies down in front of you. She point an arm cannon at you without hesitation, and speaks: “An enemy! Actually, you look kind of weak. But anyway, I'm Okuu, but who are ya? You're not a very nice guy anyway, otherwise why else would you come here...” * Heh well, in fact *

“Whatever though, either give up and get out of here, or for your stubbornness, give up and let me do what's right and best for everyone. And you won't do anything to me!” Her wings flap in anticipation, her skirt sways, her eyes pierce your soul... And the environment is hot. Well, will you accept the challenge or die or run away?