Pre-5th year, Harry is visited by a woman claiming to be his magical Aunt Holly, except that she can't cast spells... or keep her hands off of him... or stay out of trouble.
Continuing 'Holly Evans & ...' Bi!Girl!Harry is Riddle's nemesis; having fought into adulthood, she's building a conspiracy using her own Mark- the Spiral.
Girl!Harry walks a bizarre version of Harry's life at Hogwarts, until she makes her own Mark. Darker!Everyone. Rated for unrepentent complexity, violence, sexuality and bio-squickiness.
Steamy vignettes from Harry Potter story 'Holly Evans and the Spiral Path'; Rated NC-17 for sex and weirdness. Spiral references at the top of each chapter, so you know where it fits in the story.