A/N: Mari's both sweet and lewd, y'know~? Such a wholesome character~

Do enjoy~

Purify Your Sins

Sin was a nebulous topic at Trinity.

What it meant and what it was varied over the decades, generational change warping and twisting the concept along with the defining zeitgeist. Sometimes it was in the ancient sense of sinful thoughts, of impurity of body and its wants. Sometimes it was more of the spirit; that being sinful was to be cruel, but not lustful or lazy. Over time, in the modern age, it became more of a personal manner. What was seen as sinful was what the general populace saw it was. Crimes, in general, were sinful, and the preludes to them were as well.

Such as peeping on your female classmates getting changed after gym class. One young man at Trinity was guilty of that, having stood upon a stack of boxes and peeked in through a window, watching as various girls got undressed before his perving eyes – from the slender Suzumi who wore snug-fitting grey underwear to the more well-endowed Hanako that didn't wear a bra, giving him a feast for the eyes. In the end it was the pervert Koharu who noticed him and alerted everyone else, and in short order he was detained by the Justice Committee.

As punishment for his sin, then, he was sent to the cathedral to be cleansed of it. What that entailed, however, the young man didn't know.

Taking one hesitant step after another the nameless young man pushed open one of the giant doors, stepping into the large room. It was empty; the furnished pews void of life and the great statue at the far end of the room without any nun beneath it praying. It was almost haunting, how utterly silent the large room was, only the faintest of sounds coming from outside through the doors behind him. However he doubted anything in here would harm him, so he shut the door behind him with only minor reluctance, wandering inside.

''H... Hello?'' He called out, looking around. ''I was sent here by the Justice Committee...?''

Nobody answered, and for a moment he thought he had the wrong address or had somehow misheard Hasumi – had he not heard a door open. Turning his head to the right he saw a wooden door with a golden handle he'd overlooked creak open, and from within the radiant visage of Mari revealed itself. She was a familiar sight at the cathedral so he wasn't entirely surprised to see her; his cheeks warming as he realised she was looking at him. Though he'd never say it, she was definitely one of the cuter girls at the school.

The fact he'd peeked once and gotten to see he cute butt probably contributed to that.

''Welcome, sinner.'' Mari said in a soft, angelic voice. ''Please, come in. We'll begin your appointment now.''

Nodding hesitantly the young man followed the nun inside. The room was fairly small and made of a mix of wood with stone brick corners. A bed with a plain white sheet was in the middle of the room and a bedside table laid next to it with some water and biscuits, but other than that there was nothing to catch the eye beyond some wall-mounted candles.

''So uh... what are we doing?''

The heavy wood door thudded shut behind him and Mari locked it shut, her hands coming to settle in front of herself as she smiled up at him. ''Simple. We will be purging the sin from your soul, so that you may continue to be a productive member of Trinity and set a good example for your fellow students.''

''Yeah... but, how?'' He repeated, still befuddled.

Mari smiled at that – and then to his eternal shock, lifted her dress up. Instantly he was treated to the sight of her slim, creamy thighs, his gaze racing up them until he was looking at her crotch. A pair of black panties hugged her hips, low-cut and with a lace trim. Even though he'd been caught for peeping being shown a girl's panties was somehow even more arousing than just peeping, his face growing red as he just stared at her underwear. The fact he was seeing them from the front, and not the back, only turned him on more – completing the image in his mind.

''We will purge the sin from you by extracting it.'' Mari then said, snapping him out of his staring. ''Please remain calm. I will do the work.''

Punctuating that fact Mari lowered herself to her knees in front of the young man, smiling even as she reached up and unbuckled his belt. He shivered at that, excitement and embarrassment racing through him as Mari pulled his pants down to his ankles and then peeled his plain black boxers down with them, revealing his semi-erect cock. Just having the nun look at his dick made his spin, but to watch her reach a hand up and caress his cock, stroking him with her slender hand, it was almost like he was living a fantasy.

''M-Mari...'' The student breathed, shivering.

''Relax.'' Was Mari's sweet, calm response. ''It will be painless.''

As if to emphasise that fact Mari held his cock more firmly, her stroking motions hastening. Pleasure rippled up the young man's shaft, so much more intense than when he did it himself and easily bringing a moan up and out of his throat. Mari just took that as a sign she was doing well and continued rolling her wrist, her thumb starting to stroke the very tip and getting him fully-erect within moments. As if pleased by that she cooed, leaning in and rubbing her cheek against his cock, tenderly planting a kiss on the side of it.

Then without a lick of hesitation Mari leaned up more, kissed the tip – and took him into her mouth. The young man gasped, pleasure rushing through him as he suddenly found himself in the nun's mouth. He'd never even had a girl touch him let alone get a blow-job from one and the feeling felt far more intense than he thought possible, his mind briefly purged of all thought as he felt her tongue press up against the underside of his shaft, her lips gently pursing around his cock.

And then Mari started to suck. Dragging her pinkish lips up his length, sliding back down with a hum, she bobbed her head into his crotch with rhythmic ease and left the young man openly moaning – leaning back against the door behind him for support. Mari didn't mind, her eyes gracefully shut as her tongue caressed his cock; curling partway around it or slithering along it, teasing him in ways he didn't think was possible. All of it was made all the more lewd by the fact it was Mari doing it.

Not the dangerously-lustful Hanako. Not the pervert Koharu. Not even the stoic Suzumi.

No, it was Mari. The gentle-hearted, eternally generous Mari who looked better fit to be praying at an altar than sucking his cock. Not that he was complaining; not one bit.

''Ahh... it feels good...'' He moaned out, hands fidgeting without anything to grab onto.

Wet lips glided up his cock until they popped off, allowing Mari to speak. ''That's good. I'll suck all the badness out of you, okay~?''

Jerking his head in a nod the young man didn't have to wait more than two little kisses before Mari took him back into her mouth, her bottom lip grazing the underside of his shaft before she pursed her lips and slurped back up to the tip. Saliva clung to his cock as she moved, making every slow suck a wet-sounding slurp, the noise of her blow-job becoming louder as she sped up. Thanks to the material of the walls the sound seemed to bounce, filling his head with the sound of her wet blow-job, made all the more intense by the fact he could feel her mouth engulfing his cock.

Resting her hands upon his hips Mari bobbed her head faster, her habit fluttering lightly from how avidly she was moving her head. The tip if his dick hit the back of her throat but Mari barely slowed; her throat muscles clenching around the tip of his cock like a ring of flesh, coaxing a throaty moan from the young man, his hands settling on her head. When she didn't protest he started pushing her down into his crotch, mouth hanging open as he practically face-fucked the nun, his balls hitting her chin repeatedly.

''Mari... Mari...!'' The pleasure was all too much. ''I-I can't-!''

Then faster than he thought possible he blew his load. Eyes wide, mouth open, the young man came in Mari's mouth – his cock afire as she kept sucking him off, humming around his girth. The nun made audible swallowing sounds as she gulped down his cum load, sliding her lips back to the crown of his cock and stroking him off with her hand; making sure she milked him dry for every last spurt of semen she could get out of him. Only then did Mari finally slow, and then pop her lips off of his dick.

''Haah...'' Smiling breathlessly Mari wiped at her chin. ''Do you feel better, sinner?''

''Y-Yeah...'' He panted out, shivering from the force of his orgasm.

''I'm glad.'' Mari rose to her feet with the same kind-hearted smile, looking as if she hadn't just given him his first and best blow-job of his life. ''If there is... oh my.''

Mari took her eyes off of his and looked down at his cock. His still very hard, very erect cock.

''Hm... you still have so much sin in you.'' Mari noted with some concern. ''I suppose I'll need to take care of you more to wring it out.''

The young man found out what that was as Mari smiled shyly at him and grabbed her dress once more, lifting it. This time she pulled it higher, giving him a nice view of her black panties but also a peek at her stomach, her slender figure bared to him. However Mari wasn't done; lifting it higher until she could hold her dress in her mouth... before hooking both thumbs into her lacy black panties and pushing them down her thighs. Her underwear fell easily, ending around her ankles and allowing her to step out of them.

His gaze however was solely on her crotch; staring at her pussy. Having never seen a girl naked just seeing Mari's pussy, a small gathering of orange hairs above her sex, was far more arousing than any ero-magazine he'd ever peeked at. He burned the sight of her sex into his memory, tracing her slender folds and how her crotch looked compared to his own, something fascinating about it on a primal level, as if he was truly seeing the fairer sex for more than just pretty faces and weird hobbies he'd never understand.

''This way.'' Mari said softly, lowering her dress and approaching the bed.

Hurriedly kicking off his pants and boxers the young man followed her, watching excitedly as Mari laid herself down on her back and bundled her dress up around her stomach once more, her legs and sex bare to him. He joined her on the bed, simultaneously massively horny but also a little uncertain, unsure of what he should do. Mari thankfully wasn't new to this, simply smiling at him and opening her legs, presenting her pussy to him and gesturing for him to come closer.

Obediently the young man obliged, getting on top of her until their waists were lined up, the head of his cock rubbing along her folds. He tried to put it in but failed, missing the hole and ending up just rubbing the head against her lips – though that in and of itself was pleasurable, her folds soft against his cock-head. Mari giggled prettily at that, her genuinely-warm expression not waning even slightly, not a hint of mocking or teasing present. How someone could be so pure yet invite him so sensually he had no idea.

''Here...'' Pinching his cock between two fingers Mari guided the head down to her entrance. ''And now push.''

The young man obliged, and pleasure exploded through him as he sheathed himself inside Mari. She was tight. Hot. Even a little wet. The combination of sensations was as intense as it was mind-frying, all thoughts purged from his mind as he slowly buried his cock inside her one inch at a time, savouring every second. His gaze was glued to her pussy, watching his length disappear inside her body, the feeling of being inside her getting more and more intense as he inserted more of himself in her.

Until soon his pelvis pressed flush against hers, fully inside her womanhood. ''A-Ahh... wow...''

''Hehe~'' Giggling prettily Mari smiled up at him, head lolling to one side. He was pleased to see a blush on her cheeks now. ''You can move as you please. Release all the sin you have inside me.''

Eager to oblige the young man planted his hands on either side of Mari and started to pull out, intimately feeling her inner walls clamp down around his cock like a vice. He buried himself back inside her pussy quickly, his pelvis flush against her own – awakening something primal inside of him, encouraging him to pull back and then hurriedly pump back in. The friction was intense but having his pelvis against hers was the most pleasurable, and it was for Mari too if the way her expression subtly tightened was any indication. A little nub above her entrance tickled his pelvis was he drove himself inside her, his groin rubbing against it and sending a shiver through Mari.

Curious he leaned back a tiny bit, moving his right hand down and rubbing it with his thumb. Immediately Mari's pussy tightened around him, squeezing him almost, but it was Mari's sweet whimper that endeared him the most. Loving the sound the young man rubbed the little nub more, his hips not stopping either and continuing to eagerly pump into her vagina, fucking the nun against the bed with glee. He never expected to lose his first time to Mari of all people, but he wasn't complaining; far from it.

''Ah... oh, ah~'' Mari moaned cutely, her lips pursing momentarily before another moan forced them apart. ''Do I feel good, sinner...?''

''Y-Yes.'' He gasped out, leaning over her mouth and bucking his hips harder – moaning at how tight she briefly became. ''Ahh... y-your pussy feels so good...''

Mari just smiled at that, a moan rolling off of her tongue as he plunged into her harder than before. The bed squeaked and creaked under the force of his thrusts, his gaze hurriedly flicking all over Mari's body – from her crotch as his pelvis smacked against it to her legs as they twitched from the force of his thrusts, to her loving smile and cute lips. The latter caught his attention the most and, after a second, he dared to lean down and kiss her.

Mari didn't seem surprised, simply humming and kissing him back. They felt soft and tasted vaguely of cherries, encouraging the young man to drag the kiss out, to savour her lips against his own. He kept hurriedly pumping into her womanhood, loving the feeling of her tightening walls and banging more moans up out of her throat, pleasure throbbing up his shaft. The way her insides squeezed him like a fleshy vice, so very hot and tempting, made the thought of busting his load inside her irresistible.

''A-Ahh...'' Pulling back from the kiss he stared down at Mari. ''I can't stop my hips...''

''Good.'' With a kind smile Mari wrapped her slim legs around his waist, her feet interlocking behind him. ''Unload your sin inside me.''

The young man couldn't stop himself. With a moan of pure lust he dove down and kissed Mari once more, devouring her softer moan as he ploughed the nun – roughly, almost savagely slamming his cock into her tight hole. Her pussy felt amazing, tightening up at just the right moments to send waves of pleasure through him, heat rushing and spiking up his cock as he pounded the nun, his intent to cum inside her all too real and becoming too much to resist, the want permeating every inch of his being.

Until at last, he couldn't restrain himself. ''Cum- guh!''

He didn't get the full word out before the first spurt left his shaft, and with a shout the young man drove himself balls-deep inside Mari, cumming inside her. She moaned sharply, clinging onto him with both hands and twitching under him, her whole body seeming to convulse as he emptied his balls in her. The wave of relief his orgasm brought left the young man nearly light-headed, her hot walls squeezing out what felt like every last drop of semen, all of it ending deep inside her womb.

''Ahh...'' Moaning in bliss the young man leaned back; Mari's legs parting and allowing him to pull his dick out of her. A stream of white leaked from her slim folds right after. ''Woah...''

''Mm... hehe~'' Giggling softly Mari tilted her head, smiling up at him. ''Do you feel purified now?''

He was almost about to say yes, but just looking at Mari, her legs apart and her lips leaking his cum, she looked downright erotic – bringing his cock back to full-hardness. ''...not yet.''

Mari frowned – a decidedly cute expression – and hummed. ''I see. Well, we'll just have to keep trying until you're free of sin.''

With that in mind Mari shifted onto her side, then got on all fours – reaching back with one hand to yank her dress up, showing him her cute butt. Though he'd seen it when he once peeked on her, seeing it without any panties on and with her folds leaking cum made it far more exciting; the unspoken offer obvious. Without questioning her the young man shifted up onto her knees and lined himself up with her pussy, eagerly rubbing the head along her wet lower lips-

-and with a deep, happy moan the young man sheathed himself inside her womanhood, hitting her innermost parts in a single thrust. He grabbed her bare hips a moment later and immediately pulled partway out, listening to Mari's sweet moan as he scraped her walls with his cock before promptly jamming his dick back into her tight tunnel. The fleshy smack of his pelvis hitting her ass only encouraged him further, his cock sliding out only to promptly enter her once more, stirring her sensitive insides up.

''Ah... ah... ohh~'' Mari moaned shamelessly, clutching onto the edge of the bed. ''Please, d-don't hold back... empty all of your sin into me... I-I shall be a vessel, for all of the school's sin... as a good... S-Sister...!''

It became increasingly hard for Mari to talk, moans interspersing every word alongside the raw clapping of flesh. The young man didn't slow his pace even a little; eagerly pounding the nun raw like she was the last woman on the planet and he was trying to restart the human race, his cock entering her sloppy sex with audible sloshes of cum, some of it leaking down his cock whilst some also trickled down her inner-thighs, staining the bed. The lewd noise and sensation just made fucking her raw all the more exciting, his thrusts becoming harsher, faster – bucking Mari forwards before she pushed her ass back towards him, mewling as she got his cock back inside her quivering womanhood.

Her words registered in his mind moments later, a fresh shudder of lust racing through him as he realised the implications – that she would be ploughed by all the other male students as they unloaded their 'sin' into her. How many other guys had taken her in the last few weeks? How many times had they emptied their balls into her womb? Was he the first, or one of many? And how long until that flat stomach of hers would bloat with someone's baby?

The collection of thoughts coaxed a deep, throaty moan from the young man, his cock slamming into her all the faster, Mari moaned back, gripping the edge of the bed and pushing herself back onto his pulsating length, his tip scraping between her walls and bumping against her innermost parts, pleasure pulsing up his girth with every thrust.

''Mari... I'm gonna cum again...'' The young man moaned out.

''Myn, good~ Release it inside me...'' Mari mewled out.

The young man dug his hands into her sides, obeying her request with glee – pounding her pussy so fast Mari cried out in pleasure, her hotness tightening around him, milking him. Sensitive as he was he could intimately feel how her insides seized, hot her walls loosened and tightened with every subtle flex of muscle, coaxing waves of pleasure up his shaft and to the tip, said tip battering her innermost parts – until at last, the young man reached his peak.

''Mari!'' With a shout of pleasure he slammed deep inside her and came, unloading a thick gush of cum that painted her walls white; following spurts equally as thick and pumping into her willing womb, accepting his 'sinful' seed.

''Ahh~'' Mewling happily Mari gradually relaxed, smiling back at him from over her shoulder. ''G-Good... you released... quite a lot of sin...''

The young man shuddered, murmuring an agreement as he rocked his hips a little more before pulling out – his dick springing from her folds. Cum dripped from her folds in plentiful amounts, the arousing sight burning itself into his mind, but this time he didn't get hard; his cock finally having enough and going limp.

Mari was pleased to see that. ''Hehe, it seems my work is done~''

Shifting onto her side Mari looked up at him, supported by one arm. ''If you ever feel like the sin is returning, please come find me. No matter the time of day, I'll be glad to purge the sin out of you~''

The young man could only breathlessly agree, and five minutes later stumbled out of the cathedral.

Safe to say he visited Mari quite frequently afterwards.

[END]