What can go wrong? *completed* (смешанная)

Hermione works for Artifacts department, she went on the mission to retrieve an artefact and she is missing, for two whole years. Ron has a plan how they can find her...and nothing can't go wrong, right?
As usual, I'll add tags as the story progress ;)
WARNING: It is bit twisted, so feel warned. It will have occasional same-sex scenes, so read the warnings and skip the chapters with that content if it's not your cup of tea ;)