Preface: Modern AU. Song #1 is Imagine Dragon's "NATURAL." Song #2 is The Cab's "Angel With a Shotgun." Naturally, I strongly advise listening to them if you have not already; they should both be available via YouTube, YouTube Music, Apple Music, Spotify, Soundcloud, and other music streaming services.

Eren wakes with a fresh breath of air. He blinks a few times, adjusting his eyes to the morning sunlight filtered through the fabric blinds.

He glances around the room, noticing Mikasa's absence before recognizing the gentle hush of running water through the pipes in the bathroom. The consistent hum of the end of a song's crescendo beginning to taper off through the partially closed door.

Eren groans over the dull throb of a morning erection. At first unhappy he'll have to get up to encourage his business, he quickly warms to the idea of intruding on Mikasa's shower with a pointed goal. He whisks away the covers and throws his legs over the edge of the bed, standing quickly and pacing over to the door without delay.

Finding the crack in the door without a line of sight to the shower, he gingerly pushes the door a little farther in until he sees the familiar skin-colored blob of Mikasa's figure through the partially frosted shower glass – he can just make out her crest of her head over the frosting, her black hair wet and matted to her scalp. Eren pauses and continues watching her silently, enjoying the momentary voyeurist stalking. He sees her hands slick through her hair, then the clear dark blob of her head disappears from the steamy, unfrosted window. Her figure tips away from him, an arm skimming over her leg in a long, slow stroke.

The Bluetooth speaker fades to silence as the song ends.

Eren pushes the door open, silently stepping inside and whisking the door back to its original position. He looks at the shower, checking she is unaware of his presence as he finishes the door carefully.

Her figure is still stooped over.

He quietly tiptoes over to the sink, stripping the only clothing from himself and tossing it against the wood below the sink. Throwing an extra towel into the corner of the countertop adjacent to the shower stall, he keeps an eye on her figure through the frosted glass.

The silence of the speaker breaks, the familiar "Mmmm… MMmmmMMmm…" of Imagine Dragon's "NATURAL" beginning to hum through the bathroom.

"Will you hold the line…"

Eren steps closer to the shower glass.

"Will the stars align?"

Eren grabs the speaker and shifts it over the counter, staggering the movement between lines as he tries to get it closer to the stall so he can reach both the speaker and the door handle without moving. He hopes the boxy room refracts the sound well enough that she can't hear him moving the speaker. He stands beside the shower stall's junction, pressed up against the wall to better hide his outline from the lighting of the room.

"Rather be the hunter than the prey…"

The chorus begins. He can see her jaw mouthing along with the song through the blurry outline.

He waits patiently, enjoying the view as she enjoys the music in the hot shower.

"What's happenin'?"

Eren peeks over the edge of the frosting, looking down at her naked body facing away from him as she shaves her legs.

"Lookin' through the glass, find the wrong within the past knowin'…"

His fingers clasp over the handle, slowly increasing the pressure to open the door.

Before he can either crank up the speaker or open the door, she ruins his attempted surprise, her voice curling over the top of the shower stall, "Good morning, Eren." She finishes a stroke of her razor, standing up and turning to look at him peering over the frosting with an enthusiastically disappointed and arrogant, smug grin – she was well aware of his approach.

"A bit of the truth… the truth…"

She laughs at his clear disappointment, "You're not a natural sleuth, Babe…" her teeth flash, the smug grin only growing.

Eren groans irritably, ignoring the speaker plan and simply opening the door to step in with her. He pushes past his dissatisfaction by wrapping a hand around her waist, as the other closes the door behind him. She holds his gaze as he steps into the shower with her.

Mikasa brushes her bangs aside as a thick stream of water follows her hair over her eyes, smile still broad and bright, "Got something on your mind, Babe?" She teases, knowing full well where his focus lies.

Eren says nothing, letting his body do the speaking as he cuddles up to her tightly. She can feel his warm rod press against her back before the rest of his body catches up with her, wrapping himself around her.

She tips her head back to his shoulder as his head comes between her and the showerhead, continuing to keep their eyes together as his movement slows.

"And you're standing on the edge, face up 'cause you're a…"

The second chorus breaks into song, but the music quickly fades from his mind as his attention drops away from his initial approach.

Her eyes flicker at him intensely, challenging him to coax her into more than just a shower. Eren briefly considers the fact that she left the door partially open but chooses to ignore words as his tools.

His touch is slow, tedious. Creeping over her skin like the slow, persistent crawl of lunar tides over the planet. He feels her head press into his shoulder, solidifying her challenge as she lets her arms dangle aimlessly while their eyes spark. The digits of his hands encroach over her waist, dipping below the usual line of her underwear with diligent fingerwork. The tips of his fingers land like a stalking cat, steady pacing so long as he has eyes on his 'unsuspecting' target.

He feels her rock side to side against his chest, taunting him like she's still waiting for the temptation that hasn't already crept into her brain.

Her lips curl inwards as she feels his fingers graze over the loose skin between her legs. Her legs straighten, tightening firmly with a single weave. His fingers continue. Three prongs, one on either side and a single one down the center as they slide over wet skin. A long stroke, diligent and determined coasts right past the bundle of nerves as he reaches for a deeper target.

The tip of his middle finger teases her opening, just barely penetrating her. Her shoulders rock side to side again, her mind rabidly stamping out any facial expressions she may have that would compromise her guised desire.
His fingers retract the same way they approached, but fast. Much faster.

Then sweep back in with a renewed fervor.

"I'm gonnnaaa make iiiiittttttttt…."

And retreat just as readily.

A fourth finger joins the coup. Two on either side. And two down the middle, parting like the Red Sea as they wash around her nerve. Two fingers tease her opening.

And retreat.

And repeat.

And repeat…

He presses another stroke between her legs. Her eyes flicker brightly, her dull slate eyes anything but. He knows he has her under his fingertips

"NA—TUR—RAL…"

The song cuts off as her phone selects the next song from her playlist, a momentary lapse in sound aside from the steady spurt of the water over their bodies.

Eren surges forward, carefully pressing her towards the wall. He calculates her head a few centimeters from the wall, then feverishly presses her face against the cool polished ceramic. His hand smushes against her face, plastering her against the wall.

The speaker moves on. Mikasa immediately recognizes the song. But Eren is too distracted with his calculated windings to pay it much mind.

She hums, as his arm wraps around her side and dips between her legs again. His fingers work quickly, wriggling through her valley until feeling the inviting hole between her legs and quickly dipping into its tight, soaking embrace.

"Oh yeah… oh yeah… oh yeahh…"

Her lips crease under his hand, a wide grin creeping over her face under his hand. He barely feels her legs flex, twisting around in the opposite direction they should.

"I'm an Angel with a shotgun…"

A resounding thump echoes through the house.

Eren groans loudly, his hip aching as he finds himself on the floor of the shower with the water spraying in his face. Mikasa stands over him assertively, her attention breaking for the moment it takes to calmly drop her razor on one of the utility wells.

He looks up at her dimly, hand rubbing his head, "Ah! What w-"

Mikasa shrugs smugly as she steps forward, towering over him now on sprawled over the floor. Her hand reaches down towards him, as if to help him up. But her hands pass right by his with full ignorance, "Hey… be careful when you sneak up on a woman like that…" she taunts him.

Her fingers run through the wet hair behind his ears and pulls him up, more guiding than actually lifting. Eren looks up at her through squinted eyes, water sputtering off her shoulders into his eyes. She takes another tentative step forward as she looks down at him.

"With my heart on a trigger…"

Her legs wrap around his head, syncing with him sitting up through her guiding hands. She pulls his head back until their eyes meet as his tongue intuitively shoots out from his mouth, writhing over the wet skin between her legs.

"They say before you start a war…"

She looks at him expectantly, waiting for him to press the advance she allows him. Their eyes spark across the distance over her chest; most of the water jetting from the shower head streaming down her back.

Eren holds her gaze, accepting the challenge confidently as he scrapes the broad end of his front teeth, quickly followed by a wet upper lip, over the bundle of nerves directly in front of him. Mikasa hums warmly, the tension in her legs flickering as the initial orgasmic chills leap up through her legs.

A dark eyebrow lifts as he watches her reaction.

He lets the moment sink in without much further action, simply continuing the wriggling of his tongue over her flesh and brushing his upper lip over the tight knot of nerves.

"I'm an angel with a shotgun, fighting 'til the war's won…"

Mikasa's hands slick through his hair again, gently pushing his head into her. Eren maintains eye contact and pacing, waiting for the right time as his memory of the song fades into mind.

A few seconds pass quickly as she feels her head begin dancing with a tepid embrace, the feeling floating past her eyeballs and over the rest of her face through her throat in a warm glow.

"I'll throw away my faith, babe, just to keep you safe…"

Eren presses his jaw into her, shoving his tongue as deeply into her as he can manage from the angle while still keeping her eyes in view. Her thighs press against his head. His hands creep up the inside of her thighs steadily.

His pressure explodes. Rapid darts of his tongue back and forth against her walls, eager to cast off any resistance she may have in a torrent of electricity. A pair of fingers squeeze against his tongue, joining the ecstatic party tingling up through her legs and into her mind. Quick, definite thrusts of his fingers juxtaposed by brief reprieves of his tongue wrapping around within her build the hum in her lungs into a full moan, making her eyelids droop over her eyes as the pleasure drips past her limited defenses.

"And I wanna live, not just sur-vive…"

The sprint. Eren erratically massages his fingers past his tongue, desiring to completely tear away her consciousness in a single, furious assault on her senses. He feels her body shudder and quickly withdraws his hand, wrapping them around the back of her legs to help hold her straight as her climax washes down her body. He spreads his tongue on the withdraw, breaking the meandering eye contact with her to cusp her wholly with his mouth. His tongue teases her entrance, tasting the trickle of fluid streaming from her as he fights past the dilution of the shower.

Her balance sways back and forth, eyes frosted over with a weary look of the distant ecstasy rolling and crashing about her mind.

Seconds pass as Eren struggles to find appropriate timing. Her balance continues to waver as her euphoria disconnects her head from her body spuriously.

Eren scooches backwards, slipping out from underneath her as he watches her carefully. Standing on his knees, he wraps an arm around the back of her knees and the other around her lower back as high up as he can manage from the position. A single, swift contraction buckles her legs from under her – his guarded arm catching her weight and lowering her to the shower floor with him.

Her mind foggy, delirious, Mikasa's eyes trace up to his as he pushes her against the corner below the shower head. A blur shades over her vision as Eren reaches up and turns up the heat of the water. Her legs lift from the warm spray of water as his arms hook under them and his palms plant beside her abs.

Steam swirls through the stall.

Her chest contracts, a sharp wave of muscle reflexing as she feels his mass fill her.

Water from his hair drips over her face as he leans over her, quickly building the pace of his strokes. Her chest hums again, the flurrious tide chopping back up through her abdomen before the first has substantially dissipated.

"fighting 'til the war's won…"

Long, confident strokes of his hips cause her head to slack against the wall as her eyes briefly meet his. Eren continues to gaze down at her, even as her ability or will to meet him washes away in the familiar embrace of another rising climax.

The Sprint. Eren resumes his fury, pounding himself into her without restraint. She feels her head and neck bump against the wall uncomfortably, but its dissuasive pain barely manages to make its voice heard against the surging pleasure rippling through her lower body. Her body contracts again, mind imploding as her orgasm slaps into her senses.

Eren makes no effort to suppress himself. Knowing full well he broke down her defenses ages ago, he lets his quick climax push right past any resistance.

A firm, loitering thrust holds his sensitive skin fully within her, waiting until the last moment to pull out before he feels himself burst. He stands, whipping an arm from under her leg and stroking himself as he spurts hot jets of cum over her chest and face.

"You better know what you're fighting for…"

Eren grins at her, pleased with himself and finally ready to answer her unstated prompt as his orgasm recedes, "Please… you left the door open for me." He leans over her again, bring his head within a breaths distance from hers, "You wanted me to." A wry smirk coats his face.

Mikasa breathes, warm steam filling her lungs as her head bumps against the wall while she looks up at him with a toothy smile, "Maybe."

He doesn't miss a beat as she sticks her tongue out at him lackadaisically. His hand sweeps over her face, forcefully wiping his cum over her skin, her tongue catching a few stray drops from the movement. He hisses at her with a kind jeer, "Slut." Mikasa muffles a smile.

Eren crouches back into the stream of hot water, offering her his hands. She lifts hers absently, her mind still traced back to her recent orgasm. A smooth jerk rips her skin from the wet wall, pulling her around until her back rests against his chest.

The hot water spray over her face, washing the traces of his seed off her. She snorts as the water drains away the last of her deliriousness. His hands lock under her breasts, pulling her tight to him as the water showers them. Her head tilts backward, looking at him seeking a kiss.

He follows, pressing their wet lips together in a steamy fog.

The kiss breaks after a tender moment. Eren leans back, his head leaving the stream of the shower as he thinks, "So, when did you know?"

Mikasa snorts humorously not keen on giving him any hints, "Guess."

He pauses a moment, eyelids fluttering as stray droplets dapple his face. "Mm.. when I moved the speaker?"

She laughs again, dismissing him with a resounding, "No."