Light [K. Nezuko x reader]

Ｆｏｕｒ

Some weeks later, your leg finally recovered and you were allowed to take some walks alone. Strangely, you stayed at the same spots doing nothing.

"What are you doing y/n" Tanjiro spotted you standing in the back yard for a while now.

"I'm using this chance to train my ears." you explained while pointing somewhere, "and I can tell you, Inosuke is behind this bush waiting to headbutt me."

"How the heck did you know I was here?!" Inosuke jumped out from the bush startling Tanjiro.

"I can hear your heartbeat." you answered with a straight face.

"WHAT?!"

"Just kidding, I heard your snicker some minutes ago."

"Crap."

Soon, your vision was slowly coming back so you also joined the rehabilitation training. Weirdly, Zenitsu and Inosuke started to refuse coming to the training.

The stretching part was the worst in your opinion but you dealt with it. Beating Aoi in the cup and tag game was also easy for you. You also could keep up longer with Kanao but it was always you ending up being splashed.

Tanjiro asked for any advise since you were able to keep up with Kanao and a voice appeared behind the both of you.
"Are you constantly using total concentration breathing?" the girls asked upon hearing what Tanjiro just asked.

"Constantly?" Tanjiro asked.

While offerimg some snacks, the three girls explained that slayers like the hashiras and Kanao use total concentration breathing 24/7.

"Ah, this technique is very helpful," you started.

"Do you do it?" Tanjiro asked in awe.

"It does makes you stronger but sometimes I kept forgetting doing it permanently..." you admitted, "It's better to make it a habit."

Tanjiro was determined to master total concentration breathing even if it pains his lungs. But in order to get stronger and find a cure for his sister, he must master it, "Y/n, can you help me mastering it? And in the meanwhile you should focus too!"

You nodded in agreement and the training started.

You asked him to focus on his breathing and he did as told. A few seconds later, he yelped in pain, "Ugh, it hurts so much, it's like my lungs are exploding!"

"Then let's start expanding your lungs." you suggested.

In the following days you trained with Tanjiro on expanding his lungs. First, you ran many rounds with him around the butterfly estate, secondly, using the trees as parcour obstacles, thirdly, pushups, fourthly, hand in hand combat, and lastly, lifting heavy rocks.

After getting more better, Tanjiro tried to use this breathing technique while sleeping and since you have trouble sleeping you decided to do it too.

Soon, both of you were able to blew into the bottle which soon exploded.
"We did it, y/n!" the boy cheered and you also felt great at your improvement, "Let's try beating Kanao in the tag and cup game!"

At the tag game, Tanjiro was able to get Kanaos hand, while you grabbed her shoulder. He also won the cup game by placing the cup on her head, he put his fist in the air in victory and the three girls also cheered for him, and now it was your turn. You grew a bit nervous because of the attention, so you tried your best not to lose.
You blocked every cup Kanao was reaching for and when the chance came you lifted the cup in front of her face without splashing the medicine on her.

"I won." you said and you got up also lifting your fists in the air, now Tanjiro and the three girls were celebrating for you.

Zenitsu and Inosuke watched the both of you and your efforts, later, they asked you two for advice.

When you noticed that your burgundy haired friend had trouble explaining, you did it instead, "(...), so Inosuke, do you think you can do it or is it to hard for you. If it is, we get it."

Inosuke yelled, "Ha?! How dare you to look down on me?! I'll show you and beat you!"

"I'll look forward to it," you replied and now you looked at Zenitsu, "Zenitsu, you don't want to be the only one left out right? So why not come join us too? You'll grow stronger too."

Zenitsu agreed but there was no motivation in his face so you leaned closer to whisper something in his ear, "Think about it, girls like strong guys. You want to stay single forever?"

Flames appeared in his eyes, "THERE'S NO WAY I STAY SINGLE FOREVER!!!"

You and Tanjiro were now helping the both of them training. And of course, they also soon mastered the total concentration training.

Inosuke kept duelling you which you grew annoyed to. He always wanted a rematch after loosing and before he could ask you to fight him again, Tanjiro thankfully interrupted him, "Y/n! Inosuke! Our swords are going to arrive!"

"Huh? Really?" Inosuke asked.

"Yes, I got the message from a crow!"

"Yahoo!" Inosuke jumped and Tanjiro kept saying, "Let's go! Let's go!" while you just jogged alongside them.

Tanjiro got chased by his swordsmith with a knife, Inosuke made his' mad by making some changes in his swords while yours sighed in relief. Your swordsmith wasn't mad since you had his sword for a very long time now.

At their departure, Tanjiro kept apologising while Inosuke stood behind him and you only crossed your arms.
Now that the swordsmiths were gone, Inosuke challenged you again.

Without waiting for your answer, he already charged at you. You blocked his fists and he also dodged your roundhouse kick but you were still able to throw him over your shoulder.
"You improved." you said making Inosuke mad because he lost again, "why so mad? I've been a demon slayer longer than you so it's natural that I'm better." you shrugged with your hands.

You put your hand on your chin thinking about something, "now that we got our swords... Let's train your swordsmanship." you suggested.

"Why? Isn't the breathing technique enough?" Tanjiro asked.

You explained, "The more sword fighting techniques you control, the better. Call Zenitsu over."

You demonstrated a technique with Inosuke, both with wooden swords, where you snapped Inosukes sword in half. Then you walked towards a tree and you landed a giant slash on its log without breaking your sword.

The three of them stared at you in awe.
"If you master the right technique then you're able to cut everything even with a thin stick." you elaborated.

"Can you cut the tree with only a stick?" Inosuke asked and you shook your head in response, "I'm not at that level and I don't think I can do it," you said, "But I think doing it with just a wodden sword is enough."

୨୧

The four of you were blewing into a giant bottle and your faces turned red.
The three girls cheered for you in the background and soon the four of you made the bottle explode at the same time, "we did it!"

It was time for your next mission, the butterfly girls prepared many rice balls for the four of you and the insect pillar handed you a small sachet.
"What's this?" you asked inspecting the sachet.

"It contains some herbs that can help with your insomnia." she answered with a smile.

"Thank you."

She continued, "Also, I heard a lot about you from your crow. You are indeed a strong slayer, but do consider your health."

"Kuro..." you glared at your crow who rested on the fence and he gave you a "Hmpf!", your gaze shifted back to the female hashira, "Got it."

The next destinations was on a train.