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Dependency

Summary:

Izuku Midoriya secretly becomes dependent on a recovery aid to handle the pressure of hero training. While he appears more stable on the outside, he isolates himself and becomes increasingly anxious about being discovered. No one notices clearly enough to confront him, but his fear and dependency steadily grow beneath the surface.

Chapter 1: The weight of tomorrow

Chapter Text

Izuku Midoriya had become very good at looking fine.

Not happy. Not relaxed. Not even particularly confident.

Just fine.

That was the important part.

“Fine” was what people stopped questioning. “Fine” was what allowed conversations to end quickly. “Fine” was what let him walk away without anyone following him.

“Fine” was what kept everything from collapsing.

At least, that was what he told himself.

---

On paper, Izuku Midoriya was doing better than ever.

His combat performance in training assessments had improved. His reaction times were consistent. His quirk control, once volatile under stress, now looked refined and stable. Even his recovery after intense physical strain appeared more efficient than it had been months ago.

Teachers didn’t express concern.

Classmates didn’t raise questions.

Even his mistakes were small enough to be dismissed as normal variation.

To everyone else, Izuku looked like someone adapting.

Improving.

Settling into the rhythm of hero training the way he was always meant to.

But Izuku knew better.

Because what they saw as stability wasn’t stability at all.

It was maintenance.

Carefully managed. Carefully controlled. Carefully hidden.

---

It hadn’t started as dependency.

At least, not in a way he would have recognized at the time.

At first, it had been framed as support—something used in regulated hero environments to help manage extreme physical and mental strain. Something that allowed heroes to function under conditions that would otherwise overwhelm the body.

That explanation had been enough for Izuku.

Because he was already overwhelmed.

He was already pushing past limits he couldn’t properly measure anymore.

And anything that helped him keep up with expectations felt, at the time, like responsibility.

Not risk.

Not escape.

Just another tool.

Another piece of hero equipment he didn’t fully understand yet.

---

The shift came quietly.

So quietly that Izuku didn’t mark a before and after.

He only noticed that certain days became easier to get through than others.

That the weight in his body felt slightly less suffocating.

That the constant noise in his thoughts—the overthinking, the self-analysis, the pressure—didn’t feel quite as sharp.

He could still feel exhaustion.

But it no longer felt like it was pulling him under.

And because it helped him function, he stopped questioning why he needed it.

---

Izuku began structuring his life around maintaining that function.

He didn’t call it dependency.

He called it planning.

He called it discipline.

He called it being responsible.

He made sure his schedule stayed predictable. Made sure he didn’t overextend too far outside routine. Made sure he never reached the point where he felt himself slipping too far into exhaustion without something to steady him.

It wasn’t avoidance, in his mind.

It was prevention.

But prevention slowly became avoidance without him noticing the difference.

---

He stopped spending time with others the way he used to.

Not abruptly.

Not in a way anyone could clearly point to.

Just gradually.

He declined group study sessions more often.

He stayed behind after training more frequently.

He started choosing solitude over casual interaction without really thinking about it.

It wasn’t that he disliked people.

It was that being around people required a version of himself that felt harder to maintain now.

Around others, he had to be present. Alert. Responsive. Heroic.

Alone, he didn’t have to perform that role as carefully.

Alone, he could just exist.

Even if existing felt increasingly unstable without something to hold it together.

---

The anxiety came from somewhere Izuku couldn’t fully identify anymore.

It wasn’t loud panic.

It wasn’t visible distress.

It was something quieter and more constant.

A persistent awareness that something about him had changed in ways he couldn’t fully explain.

And worse than that:

A fear that someone else might notice it before he understood it himself.

He didn’t fear punishment.

He feared exposure.

Because exposure meant questions.

And questions meant losing control of the narrative he had built around himself.

---

So he became careful.

In everything.

He watched his timing when he spoke.

He monitored his reactions during training.

He adjusted his behavior in subtle ways so nothing stood out long enough to be questioned.

If he felt off, he corrected it.

If he felt too present, he pulled back.

If he felt too distant, he forced engagement.

It wasn’t conscious most of the time.

It had become automatic.

Like balancing on a surface that might tip at any moment if he stopped paying attention.

---

And yet, no one noticed.

That was what made it worse.

Not the fear itself.

But the lack of confirmation.

Because if something was truly wrong, someone would have said something by now.

Right?

But no one did.

Aizawa observed him during training, but never intervened.

Uraraka spoke to him normally, without hesitation.

Iida still treated him as reliable and steady.

Todoroki engaged with him in the same quiet, consistent way as always.

Everything continued as if nothing had changed.

Which meant either:

Nothing was wrong.

Or he was getting better at hiding it than he realized.

Neither option made him feel safe.

---

Aizawa noticed inconsistencies, but not conclusions.

Izuku’s performance didn’t decline—it fluctuated in ways that didn’t form a clear pattern.

Sometimes he was sharper than expected. Sometimes slightly delayed. Sometimes unusually steady under pressure, sometimes slightly distant in the aftermath.

It looked like adjustment.

But it didn’t feel like natural adjustment.

It felt… managed.

Controlled.

Like something smoothing over instability without addressing what caused it.

That made it harder to confront.

Because there was nothing obvious to correct.

Only something subtle to monitor.

---

Katsuki noticed something else entirely.

Not performance.

Presence.

Or lack of it.

Izuku still reacted. Still fought. Still spoke.

But something about him felt slightly delayed now, like his attention wasn’t fully anchored in the moment.

Like part of him was always slightly elsewhere.

Katsuki didn’t ask questions at first.

Because questions required certainty.

And he didn’t have that yet.

So instead, he watched.

And the more he watched, the more uneasy he became.

---

Izuku, meanwhile, was becoming increasingly aware of how fragile everything felt internally.

Not externally.

Externally, things were fine.

Stable.

Controlled.

But internally, it felt like maintaining that stability required constant effort.

Like he had to keep adjusting himself in small ways to prevent slipping.

And the more effort it took, the more anxious he became about what would happen if he stopped adjusting.

Because stopping didn’t feel like rest anymore.

It felt like loss of control.

---

At night, the anxiety was sharpest.

The dorms were quiet in a way that didn’t feel peaceful anymore.

Silence didn’t offer rest.

It exposed everything he was holding back during the day.

He would sit at his desk longer than necessary, not studying, not preparing, just existing in a state of guarded stillness.

Sometimes replaying conversations.

Sometimes checking his own behavior in memory.

Sometimes simply trying to feel normal and not quite remembering what “normal” used to feel like.

The fear always returned in those moments.

Not of discovery.

But of inevitability.

That eventually, something would slip.

And someone would see it.

---

But nothing slipped.

Days passed.

Then weeks.

Then longer.

And still, no one said anything.

No interventions.

No confrontation.

No concerned conversations that confirmed his fear.

Only routine.

Only normalcy.

Only silence.

---

And in that silence, Izuku began to feel something worse than fear.

Uncertainty.

Because if no one noticed yet…

It meant either he was doing everything right—

or he was already too far into it for anyone to catch easily.

And he didn’t know which answer was more dangerous.