I keep meaning to post to this but I get distracted. This last time my laptop broke and it's not fixed yet.

 I am looking for a fic  with Sephiroth/Zack/Cloud/Aeris. It's after Advent children. Reeve sees a tatoo that Cloud has and asks him about it. Cloud remembers his relationship with the others. Then Drauger leads Cloud to a lab and he finds the original Sephiroth, along with Zack, and Aeris.