Experiences and Experiments

"Huh? Shinobu-sempai wants to see me?"

It was late night at the nursery of the Butterfly Manor, the full moon was casting a gentle light upon the surroundings as Tanjirou looked at the grumpy girl with pigtails at the door.

"Why at this hour? Did something happen?" - he asked with concern.

"I don't know, I just do what I'm told... Come, I'll take you to her..."

Aoi mumbled, sounding half-asleep and even grumpier than her normal self.

The walk to Shinobu's quarters was a pleasant one. It was a beautiful summer night and the smells of the gardens caressed his nose, spreading a relaxing sensation through his whole body. Tanjirou almost felt bad knowing he and his companions would be leaving this place the very next morning, but they've been hosted there for almost a month now. Or rather, it's been a month since Tanjirou woke up, he didn't remember much of what happened so he only knew what he was told.

He was badly hurt in their latest assignment and lost conscience, a month ago he came back to his senses and has been treated there since then.

"Well, we're here. She's waiting for you inside, now excuse me".

Aoi said dryly as they stopped by the main building's doors.

"Hum, you sure about that? Seems like there's no one awake right now..."

Tanjirou could see no one inside and there was no candle lit, only the moonlight illuminated the interior.

"Well, she better be there or else she woke me up for nothing." - Aoi commented in an annoyed tone - "Anyway, I'm going back to sleep. Good night."

A bit curious about the situation, Tanjirou walked into the building. And indeed there she was, in the big room illuminated by the moon, in the middle of the floor there was the Hashira of Insects, Shinobu Kochou, sitting with her back towards the entrance on top of a mat.

"Ah, Tanjirou-kun! Glad Aoi-chan got you still awake at this hour."

The beautiful young woman greeted him as she got up. Tanjirou showed a warm smile at her soft gentle voice.

"Shinobu-sempai! Good night! Did something happen?"

She could be a little odd and kinda unnerving at first impressions but Tanjirou came to grow comfortable around her this past month, as she would often come to him when he was training and make small talk, giving out training hints. He was slowly coming to think of her as abig sister of sorts..

"Hehe, there's no problem. I just heard you and your friends will be leaving early in the morning and I wanted to run one last check-up on you, just to be sure you'recompletely recovered. You were brought here in quite the bad shape, after all. And beside that, life is too short to forget saying good bye, you know?"

She spoke in her usual soft tone as she walked to him. As she approached Tanjirou noticed she wasn't wearing the usual unifrom with the butterfly kimono, instead she had on a white light kimono close to her body that looked more like a nightgown, looked like she was about to go to sleep. The simple get up pronounced the features of her figure but Tanjirou dismissed the last thought quickly.

"Now come on in and sit down on the mat."

Tanjirou sat down slipping off the upper section of his patients gi, exposing his torso to be examined as usual. Shinobu worked quickly, using an instrument he didn't know to listen to his lungs as he breathed deeply then stretching and pulling his limbs to make sure there were no sequels restraining his movements.

"Well, you seem to be doing fine, especially for someone who was almost cut in half about two months ago. Now let's have a look at he wound."

She spoke in a non-chalant manner but he could sense a hint of sadness in her.

"I can thank your treatment for that, Shinobu-sempai." - he said sheepshily.

She chuckled as she positioned behind him and carefully started cutting the bandages that wraped around his abdomen.

"You were unconscious for three weeks. Even I thought you weren't coming back to us during most of it... The girls cried everyday, even Kanao-chan. And your two friends. Oh, don't tell them I told you that, hehe."

She chuckled as she finished unwraping him. Tanjirou smiled at this with a warm feeling in his chest. Talking about it made him reminisce of the half-dreams half-dellusions he experienced during his slumber. Nezuko as an oni, alone and suffering forever, was the one thing he could see in his dazed mind . He clenched his fists.

"I wouldn't die... I wiil not die until Nezuko is safe. I won't leave her, she won't be alone... she won't..." - he held a serious expression for a moment. - "Oh, I'm sorry! This talk got intense all of a sudden. Didn't mean to bother you with that, haha..."

He finished with an embarassed laugh. She laughed softly.

She ran a hand affectionately through hihs hair and let it rest on the middle of his shoulders.

"You're a sweet young man, Tanjirou-kun... Now let me see how your wound healed."

She knelt beside him and reached for his torso with her free hand.

Soft warm fingers delicately strolled by the side of his abdomen, it was not one of her usual methoducal and technical touches. This was tender and intimate and sent a shiver through Tanjirou's body.

He suddenly noticed they were very close, as she was practically holding him in a half-embrace. He could almost feel the warmth of hre body through the evening air and her face was inches from his.

"You'll have a scar..."

She whispered, he could feel her breath on his cheek. Pressing the whole palm of her small hand against his skin she slowly made her way up.

"You're always working so hard, Tanjirou-kun... I've been paying attention to you."

During his short life Tanjirou has been hugged by his sisters , has been caressed by his mother, but he's never experienced the touch of a woman quite like this. Tanjirou could feel the burning trail as her small palm slowly made it's way up across his chest, resting by the side of his neck, gently nudging his face towards hers. He was already numb at this cocktail of new-found emotions storming his brain when he saw her face almost touching his own with an intense look in her eyes. All he could bring himself to think then was that it was the most beautiful thing he's ever seen. It was as if time had slowed down and he was watching everything unfold from outside his body when she closed the distance between them and tenderly pressed her lips against his.

Tanjirou felt his head lighter as the comfortable warmth of her lips took hold of his own. Shinobu held complete control over the kiss, moving her lips aginst his in a gentle caress raising and lowering pressure as they moved in a soft massage. For Tanjirou this seemed to be going on for too long and just not long enough when she pulled away with a faint *smooch* sound and stared at him affectionately.

Half of Tanjirou's mind was aware of how inappropriate this whole situation was, the other half dearly hoped for more, the conflict inside him preventing the voicing of any coherent thought and he could only let out a weird gagging sound from his throat.

"Huhu, don't forget to breathe Tanjirou-kun."

Wide eyed and mouth hangig half open, the only thing Tanjirou was vaguely aware of was to probably be looking a bit silly.

"Tanjirou-kun, was this your first kiss?"

He looked down nodding with his head, embarrassed and flustered. She chuckled reassuring him.

"Don't worry, just follow me."

Tanjirou felt their lips locking once again, he closed his eyes to appreciate the moment and let out a surprised gasp when she smoothly brushed her tongue against his lips, he opened his mouth, letting her in. Her tongue delicately explored his mouth and met his own. She moved around, invitingly caressing his tongue and soon he was moving too, exploring her mouth, dancing and fighting with her tongue at the border of their kiss as they alternated in advancing and retreating in a mesmerizing rythm.

Tanjirou could taste her minty breath, hear her faint moans of satisfaction, feel her hand throuhg his hair, her touch across his body, he was feeling a cold in his stomach, a heat building up in his chest and a thick warmth in the back of his throat he couldn't swallow down. He couldn't quite name this feeling but he hoped it could never end.

Tanjirou let out a surprised whimper when he felt her hand feeling his member through the fabric of his pants, just now realizing how rock hard he was. Shinobu broke the kiss and spoke.

"Oh goodness, you're already thicker than I expected, Tanjirou-kun."

She whispered, gently rubbing his erection through his pants.

The sudden stop brought Tanjirou's mind stright back to earth and to the reality of the situation, also realizing he had one hand firmly gripping her waist.

"S-Shinobu-sempai! I'm... I'm sorry! This is inappropriate, I shouldn't have let this happen, it was disrespectful of me! I apologize!"

He said sitting very straight up, both hands on top of his knees, in a formal tone like he was talking to a superior.

"Haha, you really are a good man!"

Shinobu laughed in an amused tone then softly took his hand on hers.

She placed his hand back on her waist and slowly guided his touch across her abdomen up to her chest. Tanjirou could feel the warmth of her body through her light kimono on his palm as she guided him to one breast, then another one.

"You've never been with a woman before, ne, Tanjirou-kun?"

He held his breath as she gently, displicently slid his hand inside her kimono and he pressed harder on the smoothness of her skin.

"It's been long since a good man touched me like this."

She whispered, biting her lip and revealing her breasts that he proceeded to clumsily massage with his one hand.

It would be a lie if he said the thought of what Shinobu's breasts looked like under the uniform never crossed the back of his mind once or twice, young teenager that he was when they first met, but touching her like this was unlike anything he could have imagined, more akin to some surreal dream rather than the realm of possibility.

His dazed mind hazily registered their softness on his hand and the surprise at their firm consistency, his eyes reverently gulped in their volumous roundness and the small pink nipples that got harder as he gently caressed them with his thumb and rubbed them with his palm.

He felt her hand traversing his chest and ab back to his erection.

"May I?" - she asked softly, looking him in the eye.

"Y-Yes..." - he whispered.

With a motion of her hand Shinobu freed him from his pants revealing his rigid member standing straight up in attention in the cool night air.

He felt her delicate warm grip around him stroking it at a slow pace. During his whole life Tanjirou never had the privacy to touch himself, having her play with him this way was unlike anything he's ever experienced and the feeling of her touch on his most sensitive parts made rather undignified moans escape his throat as he felt himself getting even harder on her small hand.

"Shinobu-sempai..." - he whispered, squeezing harder on the skin under her clothes.

Breathing heavily at her touch, he turned to her face inches from his and looked deep into her eyes, almost pleading as they locked their lips and tongues together once more. He could feel her heart pounding as hard as his own, her hand running through his hair and neck, another hand caressing his intimacy in a mesmerizing rythm, Tanjirou was lost in time and in her touch. And suddenly she broke away.

"Come here, Tanjirou-kun... I'll guide you..."

She said in a raspy tone he never heard her use before, slipping out her light kimono revealing her completely nude figure as she comfortably laid with her back on the mat, shooting him an inviting look.

Tanjirou stared at her feminine nudity and any doubt or protest he still held within him dissipated, he felt his erection unbearably hard, a warmth building in his chest and in the back of his throat that he just couldn't swallow down. All he said was:

"E-Excuse me..."

He gently positioned himself on top of her as she spreaded her legs to welcome him in between them.

Tanjirou was careful not to put his whole weight on her small frame. Her soft form on his body, her hands exploring his back as far as they could reach. He took in her scent deeply directly from her neck and felt his head lighter, felt her eager breath on his ear and felt her shifting under his body to adjust their postion.

Suddenly Tanjirou flinched when his sensitive tip pressed against her entrance, moist and hot, irradiating a heat that could almost burn him. Shinobu held him tighter against her body and passed one leg around his waist. He felt her gasp of pleasure as he thrusted himself inside her.

"It feels so good, Tanjirou-kun..."

And it was good. Her hot core tightened around him as he started moving inside her, almost overwhelming his senses. As she got soaking wet it got easier for him to slide in and out and he picked up a steady pace, pressing and rubbing his body against hers. He was hearing her moaning and soft exclamations of pleasure as they reached a steady rythm.

"Ah!... Ah!... Tell me... Tell me you won't leave me, Tanjirou-kun!... Ah!..."

"Huff.. Huff... I won't... I won't leave you!... Huff..."

Tanjirou shifted his position, widening his base so he could up their pace even faster, thrusting into her more intensely.

"Ah!... Already knew... you're a fast learner...Ah!.. Tanjirou-kun!... Ah!... Ah!..."

She scratched his back and wrapped both legs around him as he pounded her vigorously against the mat floor.

"Shinobu-sempai!... Huff... Someone... Someone might see us... Huff.."

"Ah!... Ah!.. D-Don't worry... Ah!... Ah!..."

Her scent was intoxicating, her breathy voice was caressing his ear and he felt her squirming under his body. He was lost in his overwhelmed senses, building up more and more along with the rythm of their intimate and desperate dance until the climax spasmed through his body, a gutural exclamation coming out his mouth as a relief he didn't even know he was craving washed over him.

A numbness spreaded through his limbs as he rolled off to her side, facing the roof. They both laid there for a couple moments, Shinobu had one arm over her face, Tanjirou looking straight up at the ceiling. Their panting bodies moist with sweat rested on the mat floor as both tried to control their heavy breathing.

Tanjirou's head was spinning, too much happened too fast and now that the lust was waining down he was starting to feel a bit sick. He finally spoke:

"Shinobu-sempai... I'm sorry, I couldn't pull out..."

She laughed, catching her breath.

"Don't worry about this... There are many methods to stop the seed from taking root. Besides, you did great, Tanjirou-kun. I even lost my breathing focus there, haha..."

She sat up, fixing her hair.

"You still lack stamina, though. Guess we'll have to work on that next time you come see me."

She stood up, picking up her clothes and covering herself.

"You should probably go clean yourself and go get some sleep, Tanjirou-kun. Your group will be leaving early in the morning."

Tanjirou got up and covered himself aswell, his mind numbly trying to process what just happened. It seemed like years have passed since just half an hour ago..

They walked to the main door and stopped by the entrance. Tanjirou was unsure what to say or feel before they parted ways but she spoke first.

"Good luck out there, Tanjirou-kun. Guess I don't need to tell you it's a good idea to keep all this between just you and me, right?"

She gave him the warm, caring smile he was so used to and he felt reassured things could just go on the way they always been. He smiled back.

"Of course, Shinobu-sempai. Guess I better get going."

She stopped him, raising a hand to his face and caressinghis cheek.

"Come back safe, okay?"

She stared deeply into his eyes with an affectionate look. He could feel his face getting hotter.

"Yes. Good night, Shinobu-sempai."

On the way to the nursery bedroom his mind could start processing what happened. Most of his conscious, responsible self knew what took place was wrong in some way and he didn't intend to go on with whatever it was that started between them tonight. But the back of his mind could remember the feeling of her tongue against his and the heat of her core around him when he thrusted himself inside her, the memory made his heart run and made him want to run right back to her, hug her tight and plant kisses all over her pretty face.

With conflict and doubt building inside him Tanjirou didn't feel like going straight to bed, instead he made his way to Nezuko's room. Nezuko has been asleep since they arrived at Butterfly Manor but he just wanted to be around her right now.

He could see her motionless form on the bed as he entered the dark room. Tanjirou walked to the bed and sat down at the edge, his mind torn between his reasoning and a typhoon of newfound emotions. He couldn't even talk to anyone about it, was absolutely alone on this. He felt like something has been taken from him but he couldn't tell what it was.

Looking down at the floor he suddenly detected movement from the corner of his eye. Nezuko was lazily sitting up on the bed.

"Nezuko! You're awake!"

When she noticed his presence she cheerfully approached him but suddenly stopped.

"Hm? Nezuko, what hap.."

She stared at his face with a mix of concern and sadness in her eyes then raised a hand and patted his head. Tanjirou was a bit confused for an instant and then she embraced him, pressing his face gently against her body and resting her chin on top of his hair. He remembered how their mom used to comfort him like this, he felt safety and belonging and finnaly relaxed. Tears started rolling from his eyes but he didn't understand why.

Early on the morning the next day, Tanjirou, Zenitsu and Inosuke were already at the Manor's gates saying good bye to their hosts.

The triplets were complaining and whining for them to stay more so they could play, Aoi on the other hand seemed more satisfied than her ususal self, no doubt due to the prospect of a lighter workload once Tanjirou and his crew were finnaly gone. And then there was Kanao, standing silently a bit far from them.

Tanjirou's relationship with the girl has developed more this past month they spent trainig together, she's been acting more naturally with him and he started thinking of her as a dear friend so he approached her, smiling.

"Well, Kanao-san, guess this is a good bye for now."

She didn't look at him and didn't seem to even notice his presence, which was strange since they have been talking normally for a while now.

"Hum, Kanao-san?..."

Her emotionless face still looked away from him. She was definetely ignoring him, so he decided not to force it.

"Well, good bye then. Give Shinobu-sempai my good bye when you see her, okay?"

Suddenly she faced him, staring deeply into his eyes. A mix of hurt, sadness and anger in her eyes as they started tearing up. Then without a word she turned her back to him and walked away.

"Kanao-san..."

"Tanjirou! We're leaving without you! Come on!"

Zenitsu screamed from a distance. Tanjirou glanced one last time at Butterfly Manor before runnig after his friends, concerned but blissfuly unaware of things to come.

Notes:

It's been so long since I last posted a fic, but I was rewatching Demon Slayer these days and I just noticed the very weird sexual tension between Tanjirou and Shinobu when he was traininat the roof, so I just had to do this one. Hope you enjoy, personally I'm not too happy with my prose, feel I could do much better, but... here it is.