Attack On Titan documentary AU.
Not where the plot of the show happens in documentary form, but where the 104 trainees are film students going out into the outer walls to film a documentary about the existence of creatures called titans. They split into teams in order to see who can get enough footage to make the best documentary.
The team's are:
Armin, Jean, Annie, Marco, and Bertholdt.
vs.
Eren, Sasha, Connie, Mikasa, and Reiner.
The teams are escorted to the outer walls by a couple living in a cabin who go by Historia and Ymir. They give them basic information about the titans in the forest before setting them out on their own, silently making bets to see who comes back in one piece.
Each team is also introduced to a forest guide. Armin's group having the eccentric Hanji Zoe and Eren's group being guided through by the tough but distant Levi Ackerman.