>"Good thing there isn't a campfire, then!"
>"Well all right, but remember, you asked for it." Aya says with an exaggerated ominous tone. "This goes back about four hundred years or so, back when the Tokugawas were still in power out on the human world. A woman wandered into Gensokyo, was easier to do that back in the day. Apparantly she was suffering from a disease of some kind, I think it was TB. Used to be a lot more common. Anyway, it didn't kill her, and neither did the youkai she met. In fact the guy cured her. Apparantly made her healthier than she'd ever been before in her life. Even threw in a little youkai-style toughening for her. The guy really liked her."
>"But see, all that did was give the girl a taste. Imagine living your life, and you go from frail to diseased to dying slowly, and then all of a sudden you meet this handsome guy who fixes you all up and more. After that, being human wasn't quite good enough. She had a taste of our life, and she wanted more. So she started- Oh, we're here."