An ongoing Web Serial Novel which follows alternate versions of Touhou characters in a Magical Girl Warrior story. It's better than it sounds, with well-expressed characters and creative reinterpretations of Canon and Fanon elements. Can be read here, with a less complete version readable on Fanfiction.net. Along the way Koishi ends up as a sort of Warrior Therapist, recruiting Sirens and curing Monsters of the Week by forcing them to confront their psychological issues. See Touhou for tropes carried over from canon.