Yandere!Mirio Togata x gn reader
(this is the second chapter, first is here)
wc: 1k
You told yourself it was support. It was simpler to believe that than to notice when things stopped being your choice.
At some point, you stopped being the one who decided when you flew. It didn’t happen all at once, but that would have made it easier to fight. Instead, it slipped in quietly, tucked between gentle reminders and careful hands guiding you back to the ground.
“You’re overheating.”
“You don’t need to fly today.”
“You don’t feel well enough for that.”
Each one said in the same way he said everything else: soft and certain, impossible to argue with without sounding unreasonable.
At first, you held your tongue.
Why wouldn’t you? He was helping, right?
He always helped…
Cooling packs pressed into your hands before you could ask, timers set without you noticing, water bottles appearing at your side like he’d known you’d need them before you did, his voice steadying your uneven breaths, his hands catching you before your legs gave out.
He would always assure you with the same phrase “You’re okay, I’ve got you.” And it was true.
However, somewhere on the way, it all stopped feeling like a choice. Care blurred into something heavier; something that lingered in every touch and every word, until it seeped into your very beings and the four walls of your beautiful cage home.
He watched you more closely now — not just when you were in the air, but before. After. Always.
He was waiting for the moment you’d push too far again.
LIke he didn’t trust you not to.
The first time you tried to push past it — just once, just to prove you still could — his smile didn’t falter.
“I know your limits better than you do.” He murmured, arms wrapping around you tight. It wasn’t harsh, nor was it loud, but it settled in your chest along with worse pain compared to the failure of if you had fallen.
That was when something shifted between you two, quiet and irreversible.
Your quirk wasn’t the dangerous thing.
You were.
Your containment was redesigned under the guise of comfort.
Ventilation systems that funneled cool air directly into your room. Heat-resistant padding along the floors “in case of collapse.” WIndows sealed shut, not locked, just nonfunctional. A hero grade door that didn’t open unless Mirio was physically present.
“You’d melt if there was a fire,” he explained casually, adjusting a sensor at your wrist. “I can’t let that happen.”
He never raised his voice.
Never restrained you directly.
Never needed to.
Because Permeation made walls meaningless.
Privacy was meaningless.
You started to feel him before you saw him — a pressure in the air, a sense of being watched from angles that shouldn’t exist. Sometimes you’d turn, heart racing, only to find him already behind you, having phased through the floor like he belonged there.
“Careful.” He’d say lightly, that boyish smile always plastered on his face. “You’re running warm.”
Due to this treatment, your wings grew weaker. They were your heat and will, the thing allowing you to soar — but you were held down by a Mirio.
He noticed.
“I’m proud of you,” Mirio said, hand heavy on your shoulder. “You’re not relying on flight as a crutch anymore.”
You stopped telling him how you dreamed of the sky.
The vents whispered freedom.
You found them by accident, your fingers tracing the ceiling in restless desperation. The metal was so cold it hurt. But you studied it for days, planning carefully.
The day arrived when you were going to attempt to crawl to freedom. Mirio was gone the whole day, you never got time like this to yourself — so what better way to celebrate than being yourself?
Your heart pounded, heat blooming in your chest despite everything.
Don’t panic. Panic overheats.
The grate slid open.
Inside, the vent was narrow and unforgiving, scraping your elbows raw. But it didn’t matter. You yearned for your freedom back.
You moved faster.
For the first time in months, the air didn’t feel monitored.
Then the vent lost weight beneath you.
A hand phased up through the metal, fingers becoming solid around your ankle with perfect precision. Not frantic nor rushed.
Controlled.
Mirio’s voice drifted up, calm and disappointed.
“Oh, you could’ve hurt yourself,” he sighed “I knew I couldn’t leave you home alone. Aren’t you glad I came back?”
Mirio phased through the vent wall, emerging fully and crouching effortlessly in the space that really shouldn’t have been able to hold him. His smile was still there but it was strained now.
“Do you know what happens if you fall from that height while overheated?” he asked gently.
You thrashed. The sudden movement spiked your temperature instantly — your quirk reacted on instinct, heat flaring uselessly against the cold metal. Your wings tried to form and failed halfway, collapsing into painful nothing.
Mirio’s grip tightened. “There it is,” he murmured. “See? This is why I can’t let you make choices like this.”
He pulled you against his chest, one arm iron around your back, the other bracing your head like you were fragile glass.
“You don’t run well,” he continued, almost apologetically. “You fly. And flying will get you killed.”
The vent wall phased around you as he carried you back. You couldn’t tell where you were anymore — up, down, through — until suddenly you were horizontal again, laid carefully on your bed.
Straps clicked into place; they were soft, padded, and temperature regulated.
“I didn’t want it to come to this,” Mirio said, kneeling beside you. His eyes searched your face desperately, like you were the one slipping away. “But you don’t understand how much I need you alive. The first person I saved.”
Your body shivered as the cooling system kicked in, heat dragged from your veins.
Mirio brushed your hair back with shaky fingers. “If I let you go,” he whispered, voice cracking for the first time, “the world would burn you out. And I can’t save you from that.”
He stood, composure snapping back into place.
“So I’ll save you from yourself instead.”
The door sealed.
The air cooled.
And far above you, higher than you would ever be allowed to go again, the sky waited.
an: ill have a tag list for this fic cuz ik we're all drained for mirio content , pls comment if you'd like to be added thx <33
