This story is a slow-burn, emotional poly romance centered on the Bayverse TMNT. Iâm writing it just for myself, but if youâre here for emotionally layered storytelling, hurt/comfort, complicated feelings, and protective turtles⊠welcome.
Reader is a human woman with a blend of seriousness and dry humor. Romance develops slowly and organically. NSFW content will be included in later chapters and tagged accordingly.
I do not own TMNT or any related charactersâthis is a non-profit fanfiction written for personal enjoyment.
Chapter 1: Crashing into the Shadows
You knew the moment the ground gave out beneath you that something was wrong.
There hadnât even been time to screamâjust the sudden, weightless drop, the crack of wood and metal, and then a cold, wet impact that knocked the air out of your lungs. When the pain hit, it was sharp and immediate, radiating from your left leg. You didnât know if it was broken, but it hurt like hell.
Youâd landed somewhere deepâtoo deep. Your phone screen had shattered on impact, the flashlight cracked but still flickering in your grip. Concrete and rust surrounded you in every direction. The tunnel stretched on, damp and echoing. No ladder. No exit signs. Just a passage, one you hoped might lead somewhere up.
You walked. Limping. Breathing hard. Every now and then, water dripped from overhead, the splash loud in the silence. You tried not to think about rats.
Eventually, you found a hatch. Heavy, metal, built into the ceiling like some kind of industrial maintenance point. You hesitated, then reached up, bracing yourself as you pushed.
It gave with a groan.
You climbed slowly, carefully, pain biting into your leg as you forced your body to cooperate.
And when you emerged, you froze.
The space above wasnât another tunnel or abandoned roomâit was lived in. Concrete walls. Neon lights. Old furniture. A massive TV, shelves stacked with books and wires, a punching bag hanging from a steel beam.
You didnât have time to process much more.
Something massive moved in your peripheral vision.
You turned, pulse spiking.
And thenâhe was there.
A figure stepped into view, casting a heavy shadow in the dim light. Broad shoulders. Arms like tree trunks. Skin green. A shell. A face you couldnât begin to comprehendâpart reptile, part man, all wrong.
You stumbled back.
He moved toward you, fast.
âWho the hell are you?â His voice was rough, low, edged with something dangerous.
You couldnât speak at first. Your breath caught in your throat.
He stepped closer, looming.
âYou deaf?â he snapped.
âIâI didnât mean to come here,â you managed. âI fell. I was trying to find my way out.â
He didnât lower his guard. âBullshit.â
âIâm not lying,â you said, voice steady despite the cold settling into your limbs. âI fell through a construction site. The street gave out. I didnât even know this place existed.â
A second shape moved behind him. Then a third. You backed up, breathing faster.
This one was was wearing a blue mask. He held himself differently: spine straight, movements smooth, calculating. His eyes locked on you like he was assessing every variable at once.
The third moved with sharp precision, his expression unreadable, hands subtly adjusting something on his wrist. His glasses caught the light.
âI told you we shouldâve reinforced that access tunnel,â the one in the blue mask murmured. âNow weâve got a civilian in our living room.â
âShe could be a scout,â the first one said. âA plant.â
âFor who?â the one with the tech asked. âNo one topside knows how to get this deep without help.â
âI didnât come looking for anything,â you cut in. âI didnât even know this was here.â
âConvenient,â the first said, voice cold.
âSheâs bleeding,â the blu masked one interrupted, his eyes scanning your leg. âFall wasnât shallow.â
âIâm fine.â
âYouâre not,â he said. âAnd that woundâs already turning.â
You swallowed.
The one with the tech stepped forward and crouched near you, not touching, but inspecting. âLaceration along the outer calf. Maybe seven inches. Not deep, but youâre right on the edge of infection risk.â
âI can walk.â
âNot for long,â he replied simply.
The tension in the room hadnât broken. The one closest to youâthe one whoâd confronted you firstâstill watched with suspicion, shoulders tight, fists clenched. The leaderâthe one whoâd spoken first from behindâstudied you with a soldierâs eye.
âRaph, back off,â he said quietly. âLet Donnie take a look.â
So the tall one was Donnie. The one with the authority in his voice must be Leo.
And the firstâthe one still glaringâRaph.
You didnât speak as Donatello carefully helped you down from the edge of the hatch. His hands were steady. Surprisingly gentle. There was a stiffness to him, not unkind, but clinical. Detached.
âI need to clean it,â he said.
You sat on the edge of an old bench, watching the way he movedâprecise, calm, like every action was part of a system only he understood.
Raph paced behind him, never letting you out of his sight. Leo stood still, arms crossed, watching you just as closely.
You sat quietly through the treatment. No jokes. No bargaining. Just the sound of water and antiseptic, the burn of gauze against open skin, and the weight of three unknown lives pressing down around you.
When it was done, Donnie stepped back.
âYouâll be okay. But you need rest.â
âI donât want to stay here.â
âWeâre not giving you a choice,â Raph said sharply.
Leo didnât correct him.
âYouâve seen us,â Leo said. âWe donât know you. Thatâs a risk.â
âI didnât ask to see anything,â you replied, keeping your tone even. âI didnât come looking for trouble.â
There was silence for a moment. Donatelloâs gaze flicked to Leo, then to you.
âYouâre not the first person to end up in the wrong place,â Donnie said, quieter than the others. âBut you are the first to survive the fall and see this much.â
âSo what happens now?â
Leoâs expression remained unreadable. âYou stay. For now.â
You swallowed, jaw tight. You didnât want to argue, not when you were outnumbered, injured, and deep underground. But you didnât want to be held captive either.
âNot a prisoner,â Donnie clarified, as if sensing your thoughts. âJustâŠcontained. Until we can decide what to do.â
âž»
Later, they let you lie down on an old couch tucked in the corner of the space. Your leg throbbed, and you couldnât quite shake the feeling of being watched.
When you wokeâstill exhausted, disorientedâthere was a blanket pulled over you. A bottle of water beside your arm. And a note scribbled on the back of what looked like a torn blueprint.
Youâre not trusted. Donât make that worse. Stay put. â R
You stared at it for a long time.
Then you sat back, silent.
This was real. And you were nowhere near the surface anymore.
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I genuinely believe that April in 2012 could have been an amazing character and her and Donnie could have been so cute together if she wasnât written so poorly. In saying thatâŠ.
I want Raph to get angry at her. I really want there to be a moment where April has just led Donnie on yet again, giving him another cheek kiss then just a day later telling him to leave her alone and going out on a totally not-a date with Casey. Raph is the only one who sees the tear brimming in his little brothers eyes and heâs had enough, no one hurts his brothers, especially not like that.
April has just left the lair and Raph follows her, waiting until she turns around to ask whose there to bring his Sai up to her throat while shoving her against the wall.
She protest, a brief look of fear in her eyes before she clearly gets annoyed, âRaph, what the hell are yo-â
âshut it. Youâre going to listen to be because you only get one chance and I ainât repeating myself. My brother is an idiot, heâs a mad genius but heâs still a person and he loves you. I donât give a shit if you donât love him back, you donât have to, but if you play him one more time for whatever pathetic reason you have, wether itâs you want attention or your just a soulless freak, I will kill you. It wonât be quick, it wonât be painless, and theyâll never find you to give your dad solace. My brother deserve better than anything you could give him, so either accept him as he is, mutant and nerd and all, or back the fuck off. Got it?â
April is shaking by that point, a small cut already appearing on the front of her neck as well as a smaller one on the side where the smaller prong of his weapon digs in. She looks close to crying but sheâs still a brave person and keeps it.
She nods rapidly.
Raph leaves, letting her slump to the floor while gasping for breath and he doesnât look back. They ask what happened to her neck the next day and she says nothing, though Mikey notices her being tense around Raph who looks eerily calm.
The room around youâdimly lit and oddly quietâwas still foreign. Too quiet. Every creak of metal, every low hum of machinery in the walls kept you on edge. Youâd tried shifting under the blanket they left, but the dull ache in your calf reminded you you werenât going anywhere soon.
It wasnât until hours later that you heard voices.
Low at first, then rising slightlyâenough to make out distinct tones. You stayed still, listening. Three of them again.
âSheâs not a threat.â That was Donatello. Calm. Measured.
âYou canât be sure,â Leo said. His voice carried authority, but not cruelty. âThis couldâve been a setup. Someone could have known about us.â
âNo one aboveground has that kind of intel,â Donnie replied. âAnd if they did, they wouldnât send one unarmed civilian limping through a tunnel.â
A pause. Then the unmistakable growl of Raph: âI still donât like it.â
âYeah?â Donnie answered. âYou donât like anything.â
You almost smiled at that. Almost.
But then the hatch creaked again. New footsteps this timeâlighter. A different energy entirely.
âGuys, why didnât anyone tell me we had company?!â The voice was younger, lighter, undeniably curious. âYouâre telling me I missed a whole human falling into our house? Thatâs, like, a top ten sewer event.â
You sat up slowly as the footsteps approached.
He was the shortest of the four. Still bigâbigger than any human youâd ever metâbut slighter than his brothers. Orange mask. Blue eyes that flicked toward you with no fear at all. Just open curiosity.
âHey,â he greeted with a wide grin. âYou awake?â
You nodded once.
He walked closer, careful not to crowd you. âNameâs Michelangelo. But you can call me Mikey. Everyone does.â
You didnât answer immediately. He waited, patiently, then added, âYou donât have to talk if you donât want. I get it. I mean, weird day for you, huh?â
âYeah,â you said quietly. âSomething like that.â
Mikey crouched beside the couch, arms resting on his knees. âYouâre not hurt bad, right? Donnieâs got, like, ninety-eight first aid certifications. I think he invented half of them.â
âSheâs healing,â came Donnieâs voice from across the room. Heâd entered without you noticing. âBut slowly. I donât want her moving around too much for at least another day.â
You glanced at him. Tall. Quietly intense. He hadnât looked at you directly since enteringâbut you knew he was watching. He always was.
âI wonât go anywhere,â you said. âI donât even know where I am.â
Leo stepped into view then, eyes sharp. Blue mask. Broad shoulders. The kind of posture that told you he was always waiting for something to go wrong.
âYouâre in our home,â he said. âAnd weâre still deciding what that means.â
You met his gaze, refusing to flinch. âI didnât ask to be here.â
âNo. But you are.â
âI told you the truth.â
âAnd we heard it,â he said. âBut truth isnât always safe.â
âLeo,â Donnie said quietly.
Leo exhaled through his nose, then finally nodded. âYouâre not confined. But you donât leave this room without one of us nearby. Not yet.â
You nodded back. That seemed fairâconsidering.
Mikey clapped his hands once. âCool, now that the prison terms are outta the way, can we feed her? I mean, I donât think weâre monsters, right?â
âIâm not hungry,â you said, automatically.
âYou will be,â Donnie murmured as he walked past, already moving toward a panel built into the wall. You noticed how his eyes flicked toward your leg again before he disappeared into a side hall.
Mikey grinned and stood. âIâll heat up something. You ever had sewer-baked mac and cheese? Itâs mostly edible. Sometimes even cheesy.â
You blinked at him.
He grinned wider. âKidding. We have real food. Promise.â
âž»
A few hours later, you were sitting on the edge of the same couch, a reheated slice of pizza balanced on a plate beside you. Your leg still throbbed, but the pain was manageable. You couldnât say the same about the tension in your chest.
The room was quieter now. Raph sat in the far corner, leaning against the wall with his arms crossed. Hazel eyes shadowed. Watching. Not talking.
You could feel his distrust like a physical weight. He didnât bother hiding it.
âYou got a name?â he asked suddenly.
You glanced over. âYeah.â
He raised a brow. âGonna share it, or are we supposed to keep callinâ you âthe humanâ?â
You gave it.
Raph grunted. âHmph.â
That was the end of the conversation.
You sat in silence, unsure what to do with yourself.
Then Donatello reappeared. He didnât speak at first, just pulled over a small terminal, tapping quietly. The glow of his tech cast faint shadows on his face, softening the angles.
âI rerouted the security feed,â he said without looking up. âNo oneâs followed you. No unusual movement topside.â
âThanks.â
âI didnât do it for you,â he said. But his voice wasnât cold. Just distant.
Leo returned last, his gait quiet, posture still rigid. When he entered, the energy in the room shifted. Like everyone braced just a little.
âWeâll take turns watching,â he said to his brothers. âOne of us is always in the room while sheâs here. At least until weâre sure.â
You looked down at the floor, jaw clenched. âYou think Iâm a threat.â
âI think youâre a variable,â Leo said. âAnd we donât leave variables unchecked.â
âYou donât know me.â
âNo,â he said. âWe donât.â
âž»
Night fell, if it could even be called that underground. The lights dimmed on a cycleâless a sunset and more of a power-saving mode. You curled back up on the couch, eyes heavy. Your leg ached. The silence pressed down again.
But there were sounds, soft ones: the hum of Donnieâs tech, Raphâs breathing from across the room, the faint rhythm of Leoâs footsteps pacing.
Mikey had fallen asleep on the floor nearby, curled on a blanket like a cat. You didnât know what to make of him yetâtoo open, too lightâbut he was the only one who hadnât looked at you like you were a problem waiting to explode.
You turned your head slightly.
Donnie was still at his terminal. Eyes focused. Fingers moving. But every few minutes, he glanced overâjust for a second.
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You woke in the early hoursâif they could even be called that, underground.
The air was colder, the lights dimmed to a soft glow. Your body ached, the makeshift couch no match for real comfort, but that wasnât what kept you awake.
It was the stillness.
The quiet kind of still that feels wrong, like the world has paused just long enough for your thoughts to catch upâand drag you under.
You sat up slowly, adjusting your leg, careful not to shift the fresh bandages. The pain had dulled, but it was still there. A lingering reminder that you were somewhere you didnât belong.
You glanced around.
Mikey was snoring softly on a floor cushion, limbs sprawled out like heâd collapsed mid-story. Raph wasnât in the room. Leo stood near the far wall, arms crossed, eyes closedânot asleep, just resting. Watching without looking.
And Donatello was where youâd last seen himâseated at his workstation, tall frame hunched slightly forward, light from the interface casting a pale green glow on his face.
You stared for a while before deciding you couldnât sit there anymore.
Pushing yourself to your feet, you limped quietly toward him, biting down on the discomfort. He didnât turn until you were within armâs reach.
âYou should be off that leg,â he said, without looking up.
âI know.â
âYou need something?â
You hesitated, then slowly lowered yourself to sit against the nearby wall. The metal was cold, the floor unforgivingâbut it grounded you.
âNo,â you said finally. âI just⊠didnât want to be over there anymore.â
He still didnât face you fully, but his posture shiftedâless guarded now. âCanât sleep?â
You nodded. âToo quiet.â
Another pause.
âYou get used to it.â
âDo you?â
He looked at you then. His green eyes were striking in the low lightâsharp, but not unkind.
âEventually,â he said. âOr you stop noticing.â
That made you go still.
You watched him for a moment, the silence stretching between you. The hum of tech filled the gap.
Then you exhaled, quiet and slow. âCan I ask you something?â
He nodded once.
âWhy didnât you question me? The others⊠I get it. Iâm a stranger. I know that. But you treated me like I was already part of something.â
Donnieâs expression didnât change. But you saw his hands still. The faintest flicker of thought behind his eyes.
âBecause I listen more than I assume,â he said simply.
You looked away. That landed harder than you expected.
After a moment, you whispered, âI donât have anyone.â
Donnie didnât speak. But you felt him shift againâlike a frequency tuning in, quiet and steady.
âMy familyâs gone,â you said. âNot recently. But⊠it doesnât go away. The feeling. You move forward, but youâre still carrying the weight. And I moved here thinking I could rebuild something. Start over.â
The words scraped out of you like gravel. You hadnât meant to say all of it. But it was too quiet not to speak.
âI havenât made any real friends yet. I keep telling myself it just takes time, but sometimes I think⊠maybe people just stop trying after a while. Maybe I did.â
You looked down at your hands. âAnd now Iâm here. In a place I shouldnât be. With people who probably wish I wasnât.â
Donnie was quiet for a long moment. Then he leaned back slightly in his chair, adjusting the screen so the light wasnât shining in your face.
âNo one asked to be down here,â he said softly. âWe didnât choose this life. We were forced into it. And weâve made the best of itâbut trust me, there are days where even the best feels like survival.â
You blinked.
He wasnât looking at you anymoreâjust the space in front of him, somewhere far away.
âBut the ones who find usâaccident or notâare always the ones who were looking for something. Even if they didnât know it.â
You swallowed. Your throat was dry.
âWhat makes you think I was looking for anything?â
Donnie gave the faintest smile. âBecause you stayed awake. And you walked toward me instead of away.â
You didnât answer. You didnât have to.
The silence that followed didnât feel heavy anymore. Just real.
Then Donatello stood slowly, turning off the interface screen. He moved to a tall storage cabinet, pulled something out, and returned with a blanketâheavier than the one youâd had before. Thicker. Cleaner.
He handed it to you without a word.
You took it carefully.
âTry again,â he said. âSleepâs easier when youâre warm.â
âDonnie,â you said quietly.
He paused.
âThank you.â
His eyes met yours againâgreen, steady, and for the first time⊠soft.
âDonât thank me yet,â he said. âIâm still not sure I trust you.â
âBut youâre the only one who doesnât treat me like Iâm a threat.â
He didnât smile. But something in his expression eased.
âMaybe thatâs why Iâm the one who should be careful.â
And with that, he walked back to his workstationâshoulders relaxed, attention shiftingâbut not before glancing back once more.
Raph had rough houses with humans before, outside of training and play fights with his sister. Heâd dealt with bank robbers, a guy who tried to steal a cat, basic thugs, all kinds of people.
Yet he never killed any. That was too far.
But then they went out with their Yokai made human disguises, which they couldnât control outside of changing clothes and the like, and two men decided to mess with his brother. Leo was wearing a gorgeous, blue knitted sweater with yellow flowers, a small white crop top and a pair of ripped up jeans, some white heeled boots that gave him a few inches to finish it off. His bold, red eyeliner and lipstick, black mascara and soft pink blush had taken him only ten minutes, years of practice helping him get it done in no time. Yet despite how beautiful his brother look (and Raph would spend the rest of his life making sure it was known he had the most beautiful brother in the world), some people seemed to have an issue with it.
The looks they were used to, Raph and Donnie easily scaring anyone off before they could do any harm aside from making their brother insecure. But these two men in particular chose to shoved his brother, pushing him against the wall and causing him to twist his ankle badly. Leo was left in shock, unable to call on instinct to help himself as the two men started shouting slurs and abuse at him.
If it hadnât been night, maybe Raph would of been able to reason with his own rage a little more, alas it wasnât.
He had ordered Leo to open a portal, who did without question though a bit of shaking, allowing Raph to grab both men and drag them through. Leo hadnât joined him, going home to sob into his twins arms, but they all knew when Raph came home with bloodied hands and news reports spoke of two missing men that Raph had dealt with them in his own way.
No one ever spoke about it, not even when it happened again and Leo told Raph to just go home, that he could handle it this time. Raph didnât regret his choice, not when Donnie and Mikey gave him looks to say they wanted to do the same thing.