(Levi x Petra) Shock

(This takes place after the Return to Shiganshina arc in the manga, so there will be major spoilers)

Though it has been many months since the deaths of the old members of the Special Operations Squad, there is still something that will always remain empty in Captain Levi's heart. Something Petra Ral could only fill. Levi keeps telling himself that he has to move forward, but for some reason, he cannot. And to make things worse, Levi knows that Petra will be gone forevers.
However, after eavesdropping on a conversation between the new commander of the Survey Corps, the titan-lover Hange Zoe, he partially hears about an action that the now deceased Commander Erwin carried to his grave. Though Levi doesn't believe it at first, the action is soon confirmed on an expedition, where the Survey Corps witness Titans being killed by an unknown stranger. But they will be shocked upon finding out that the stranger is none other than the long-lost, thought-to-be-deceased Petra Ral. Petra is warmly and tearfully welcomed back, but what will happen when something escalates between Levi and the revived soldier?