The next morning, Nezuko turns to the girls with carpet beaters. "Hey, Nezuko! Good morning. What's with the carpet beaters?" One of the girls asks, as the girls were in total confusion of why the Demon Slayer was handing them the carpet beaters. 

Nezuko beams with total excitement, as she said, "Well, to answer your question, it's for training. 

I want to continue my training with Total Contraction Breathing as much as I can while I'm here. I want you guys to help me out." 

"Are you absolutely sure it's ok?" One of the girls asks , as she was stunned of her answer. 

"Of course. Listen, if I stopped using Total Contraction Breathing at night without noticing, I want you guys to smack me as hard as you can to prevent me from stoping the Breathing . 

Can I rely on your help?" She asks them. The girls exchanged looks at one another before looking at the girl. 

"All right , Nezuko. You can count on us!" 

Nezuko beams in total happiness that they will willing to help her with her training to get well before being send off to her next mission. 

Nezuko was using the technique at night , as the girls were looking at her directly at her process. 

"Ms. Nezuko is doing well! I know she'll pull it off." One of the girls said. 

She suddenly stops as the girls uses the carpet beaters as Nezuko felt the pain from them, as she realizes that she messed up. 

Nezuko bows in total apology, "I'm so sorry you guys. I really stupid .  I want to try again, ok? " 

"You can do this, Nezuko!" 

"Just hang in there and you'll do great!" 

Inosuke and Zenitisu were looking at her with curious and worried expressions on their faces, of why she was so determined. 

"Let's do this again. This time for sure!" She said. 

Nezuko slept again to try again of using the Breathing technique , but she unfortunately fails at the second attempt as the girls used the carpet clobbers again. 

As for the next day, Nezuko was able to attend the rehab class , but Inosuke and Zen was unable to attend. 

The girl sighs, "Don't tell me. Inosuke and Zenitisu didn't want to attend again?" 

Nezuko bows in respect, "I'm so sorry! I tried to get them both out of bed, but the boys refused to listen to me! I did my best to get them to come, honest!" 

She climbs the rope tug as she thought, "I am starting to getting use of the training , while using Total Breathing Contraction! 

Although I can't sustain it all day, unless I pump myself up. " 

Nezuko was doing pushups, "The longer I use Total Breathing Contraction Breathing, the bigger my stamina will increase!" 

It was then, Nezuko faced Kanao again, to see if she can catch up to her in mortal combat training. 

Both girls begin their training. 

Nezuko was going faster than she ever can before, as she exclaims, "Wow! I can catch up to Kanao! This is great! " 

She was almost able to touch her, but Kanao flips over her as Nezuko fell to the ground instantly. 

"Ow! That really hurts." She said.  

That evening, she said, "Thanks for having me!" The girl turns in anger as she saw the boys who was able to get out of bed, as Nezuko glaces over to see them, staring at them. 

"Zen! Inosuke! C'mon, let's train together!" She calls out to them, but the boys were absolutely terrified as they dashed off immediately , as Nezuko was confused at their response. 

Nezuko was looking at the gourd as she was determined to break it, as she blows on it, as hard she can as to her amazement , the gourd broke! 

"All right, it broke! I did it!" Nezuko cheers happily of her accomplishment. 

One of the girls hold up the massive gourd, "Now all you need to focus of breaking this gourd, Nezuko! We know you are capable of successful training you put in!" 

Nezuko concurred with her, "Yeah, it wouldn't be long now . I'm really glad that you guys are helping me out with training. You guys are the best! " 

Zen and Insure was watching from the distance , as they were amazed by her training. 

Zen thought, "Oh, crap. Nezuko, what are you doing?"

Zenitsu was already awoken up in the morning, as he notices that Nezuko must've gone training at the crack of dawn. 

"Whoa. Nezuko is already up and training already? It's the crack of dawn and she's really giving her all. Unlike me and Inosuke. 

His sparrow appears to him as he said, "Oh, it's just you. You know.. Nezuko really is something else. I'm not like her. " 

But to his amazement, Insure was determined as he wanted to trained . "Let's go, Zenitsu." 

He blinks as he was amazed that Inosuke wanted to train this time. 

Kanao explains to them what Nezuko was training so hard. "The one that Nezuko is trying to master is called, "Total Contraction Breathing, Constant. 

Believe me, I was shocked of that she was trying to master it, but she was so determined , and she took everything she had learnt from her Sensei. " 

The boys were amazed of Nezuko's reckless attempt as Kanao said, "Let's try it, shall we?" 

The boys were completely unprepared of it as both of them was panic pains from it. 

"This is so impossible! I can't believe that this is what Nezuko was doing! It hurt so much!" Zen said in pain. 

The boys listen to what Nezuko had to say. 

"You know, I'm impressed that you both wanted to master this. I'm not capable of using it myself yet, but I know that you guys have the guts to do it! You have to get your stamina going as much you can, as using your lungs!  And in top of it, you have to train harder than before." She explains. 

The boys were scared as they shook their heads, as they realized that it sounds impossible for them to do. 

Kanao touches Nezuko's shoulder, as she chims in, "Let's just say , it's a beginner level. You know that this technique is possible if you worked hard, just like Nezuko suggested. " 

The Demon Slayers begin their training as Shinobu looks at her adoptive sister, "Kanao, you're in the same class as them, why you just joined with them? I'm sure that Nezuko and the others would love to have you joined in." 

She nods as to leaving her adoptive sister as she glaces back in thought of Shinobu and her sister, Kanae saved her and let her live with them from horrible people who used to bully her and gave her a hard time. 

"You know... this coin is special. It helps you when you can't decide what to do with your life. Someday, when I'm not around, someone will come to you and help you for anything. So, keep this as a token of memory, Kanao." Kanae said. 

Kanao kept the coin since her sister's death, as she smiles and flips the coin. 

As the training continues, Nezuko's crow came with a message as she was expecting some news. To her excitement, it was the news about her and Inosuke's swords finally being reforged and ready to be used again. 

"All right!" She exclaimed, as she went to find him to deliver the good news. "Inosuke, great news!  The swords , they already been reforged! We'll get to use them again! " 

"For real?!?" Inosuke asks her in surprise tone as she said, "Yeah , I'm just happy that I'm getting my sword back. I missed being it with me." 

She sniffed the air, as it was a familiar scent to her, like it was been forever. "Hey, I can smell it. It's Mr. Haganezuka! " 

Inosuke and Nezuko ran towards the entrance to see Mr. Hagnezuka. "Let's go, Inosuke!" Nezuko said as they made it outside of the Butterfly House. 

  She notice the man right away, as she waves to welcome him, "Hey! Mr. Hagnezuka! Long time no see! How you been-" She said, but he was irate at her . 

He said, as she was scared of his reaction, "How dare you split my sword in two?!? Do you have any idea how long it took me to forge that sword for you?!?" 

She said, as she was trying to explain, "Mr. Hagnezuka, please calm yourself. I didn't mean to break it, I swear! 

It's just that the opponent I was facing with , was a Lower Moon Five Demon , Rui, and he was extremely powerful than I thought it would be. " 

The other companion he brought along said, "Well, excuse him. He's just a passionate swordsmen who forged Demon Slayer swords for a living. It's like his main hobby of his. 

Oh, I haven't introduce myself. I'm Kozo Kanamori. I was the one who forged Inosuke's duel-wielding sword. "

Nezuko blinks in surprise, "I had no idea that you were the one who forged his sword. That's amazing. " 

Inosuke found a rock and he bend the two swords to familiarize himself like the sword he had used before! 

Kozo said, "How dare you use that rock to destroy the beautiful swords! I'll kill you!" Nezuko has to pull him away from anything to harm her friend. 

That night, she manages to use the Breathing Technique as one of the girls said, "She's doing great. Let's make her some rice balls." 

"Good idea, who knows, she might beat Kanao this time." 

The next morning, Nezuko was facing Kanao again. Nezuko was going way , way faster than she ever gotten as she thought, "My body has dramatically changed since then! I can't wait to use my sword to good use this time! I wouldn't be like I was used to be . I'm not scared anymore! " 

She managed to catch her by touching her wrist, as she gasped of it, as Nezuko gasps as well as she accomplished one of the training skills that was needed for her recovery.

They did the cup training and she also managed to succeed too, by letting the cup touch on her head, knowing of how the cup smells horrible and it would be absolutely embrassing to splash it to Kanao since she was helping Nezuko with her training, and wants to be friends with her the right way. 

Shinobou and Nezuko had a checkup on her other injures. "Ok, Nezuko, say, "Ahh." 

"Ahh." She said, opening her injured jaw, as Shinobou looks at it completely. 

"Well, good news. Your jaw is good as new. You did great . So, you can close your mouth, please. And also you can go on missions now. "  She reported as she did.  

Although it was in Nezuko's mind for quite some time about the fight she had back at Mt. Natagumo , with Rui, and having Tanjiro battled with her, she couldn't stop thinking about the last move she had.

Shinobu asks, "Is something wrong, Nezuko?"

She nodded, "It's been in my mind for quite some time now. It's what happened back at Mt. Natagumo. Have you ever heard of the Hinokami Kagura Dance?"

"No, I haven't. " 

"Well, it's been in my family generation since I was a kid. Somehow I was wondering can it be related to Fire Breathing?"

The Insect Hashira thought, "Hm. It seems like your father has the ability to Fire Breathing and passed it onto you. Although, I am not familiar with your situation." 

Nezuko sighs, "Oh, I see." 

"Chin up, I think I know who can help you out to solve this mystery. It's the Fire Hashira, Rengoku . He might have some insight of this if you explained this to him. He'll know exactly what to say to you. 

But at the moment, he's on a mission right now." Shinobu explains. 

"Well, I guess that I have to ask Rengoku if I get the chance to see him. Well, I guess that this is it. Thanks for everything, Shinbou. You're a big help to me and the others. We should talk more often." 

"Hey, I don't know if we get a chance to. But if we do, I would gladly take that offer." She replied to the girl. 

She went to her brother's room as she sees Tanjiro still asleep in his bed. She stares at the demon boy, "He's asleep again, huh? Well, that figures . Tanjiro is a demon after all. " 

She thought , "I know that you were just resting to regain your stamina , Tanjiro, but it does worry a little that you didn't open your eyes once a while. " 

"You know, Tanjiro, we'll be able to leave the Butterfly House sooner than expected, as so I can go to my next mission. 

Zen , Inosuke and I have changed since we been here. And I can use Total Contraction , Constant more freely now. 

I still owe Miss Tamayo the blood samples she needed for making the antidote for you to turn you back into a human. It wouldn't be an easy task though. " 

She thought, "Can I be able to do it?"

Suddenly, Tanjiro's voice came to her, as he said, "I know you can do this, Nezuko. Don't give up just yet. I know you better than anyone . " 

Nezuko turns as she was shocked to finally hear her older brother's voice for the first time since he had turned into a demon. 

She smiles at how much trust her brother has, that of knowing how capable she was since her journey had begun to become a Demon Slayer. 

"Thanks, Big Brother. You just encouraged me just now, haven't you? You're absolutely right, I can't give up now. We have just begun. " She said.