Between the Trees (гет)

Winter winds whipped again, unearthly. A liquid aurora, ice-crusted wind, and the pull of a snow-dense forest drew Hermione in. Drew her deeper.
The woods called, beckoning.
When Hermione blinked awake, a frozen shudder rolled through her. She was in the Forbidden Forest. Again. On another winter solstice.
[In which something keeps pulling Hermione into the Forbidden Forest on the winter solstice, and her new co-worker notices.]