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Dangerous Proximity

Summary:

A few weeks after Trost, Eren Jaeger is placed under Captain Levi’s command as the only known human who can become a Titan. The trial is over. The paperwork is settled. What begins next is something quieter and far more dangerous.
Training. Observation. Control. A new routine built out of caution, necessity, and the fact that no one knows what Eren is supposed to become. Least of all Eren himself. But the closer Captain Levi moves from distant authority to constant presence, the harder it becomes to tell where discipline ends and something far more complicated begins.

Chapter 1: Before (Prolog)

Chapter Text

Five years ago, the Colossal Titan appeared at Shiganshina and broke Wall Maria.
By the time the screaming stopped, Eren Jaeger’s mother was dead beneath the wreckage of their house, his father was gone, and the district he had been born in no longer existed in any way that mattered. Humanity gave up Wall Maria soon after. What could not be reclaimed was abandoned. What could not be defended was left to the Titans.

The Colossal was never brought down.
It still exists somewhere out there beyond the lost land, moving through the ruins of the world it helped destroy.

For five years, that was enough to shape a life around: hatred, survival, training, and the simple fact that humanity had already been pushed inward once and might not survive being broken again.

Then Trost fell.

Not to the Colossal Titan, but to the Armored.

Another breach. Another district swallowed by smoke, blood, shattered stone, and the sound of people dying too fast for anyone to help them. The same panic. The same ruin. The same certainty, for a few terrible hours, that humanity was about to lose even more ground and call it strategy afterward.

That should have been the whole story.

Instead, in the middle of Trost, Eren turned into a Titan.
No one had prepared him for it.
No one had given him an explanation.

No one had put that power into his hands and told him what it would cost.
It happened anyway.

One moment he was a soldier in the middle of a collapsing district. The next, he was something impossible. Something monstrous. Something that should not have existed at all.

It changed nothing and everything at once.
Trost was retaken. The wall was sealed.
Eren survived it. Barely.

Then came the trial.

He was dragged out of one battle and into another, this one fought in uniforms and measured in verdicts. Human or monster. Asset or threat. Useful or disposable. In the end, the decision had less to do with mercy than utility. He was too valuable to kill quickly and too dangerous to leave unwatched.

So they handed him to the Survey Corps.

To Captain Levi.

By the time this story begins, all of that has already happened.

The walls still stand where they stood after Trost. The military has had time to rearrange the damage into procedure. Eren is no longer in custody in the most obvious sense, though that does not mean he is free. He is already under the Survey Corps now. Already under Levi’s authority. Already living inside an arrangement built out of caution, necessity, and the fact that no one really knows what he is.
Including him.

But this is not the story of Trost.
It is not the story of the trial.
It is not even the story of Eren’s first transformation.
It begins a few weeks later.

At the point where the shouting has mostly stopped.
At the point where survival has hardened into routine.
At the point where papers have been signed, orders have been given, and everyone has begun pretending the situation is stable because the alternative is less bearable.

Eren has seen Levi by then, of course.
Everyone has.

Humanity’s strongest soldier is difficult to miss. But rank can keep a distance all by itself, and so can reputation, and so can the quiet structure of command. Until now, Captain Levi has belonged more to the edges of Eren’s life than to its center: a presence, an authority, a name attached to the decision that now governs what happens to him.

That, too, is about to change.

Because the real story starts there.

Not with the first disaster.
Not with the first loss.
Not even with the first impossible thing.

It starts when the distance closes.