You're Rumia, the man-eater darkness youkai. One day the whole Gensokyo was covered in a thick blizzard, you found yourself in that blizzard, which made you feel quite lost, the blizzard was so dense you couldn't see further, so you decided to create a black orb around you, and wait...

Suddenly someone approaches, it is Cirno, she was also lost and seeing you, she relaxed a bit and decided to get out of the blizzard with you

"Rumia! Come on, we need to get out of here..."