For the past 15 days, you have been training with Kanao and Tanjiro. On days you're with Kanao playing Tag and going against her in the cup Reflex Training. And on nights, you meditate with Tanjiro to master your Constant Total Concentration Breathing. You have seen improvements in your training with Kanao. For one thing, you finally beat her in the game of Tag! Not to mention it only took you ten minutes to grab her. Kanao and Aoi were shocked that you managed to beat her. Aoi at one point accused your success as "beginner's luck". So the two of you went another round...and you beat her again in 13 minutes. Though you still haven't beaten Kanao in the Reflex training. But it does take over an hour to stall her before she splashes you with water. You just have to beat her in that one and you'll officially complete your Rehabilitation Training.

Hanging out with Tanjiro at night is nice and relaxing. Well if you can call breathing and meditation relaxing without saying a word to each other "nice"! Tanjiro here instructed the butterfly girls to whack you in your sleep! Even though they have whacked you less than him because you can maintain your breathing a lot longer than him, that doesn't mean it hurts any less. But you do feel bad for those girls. For every moment they paid attention to you both, that's a moment they're not getting any sleep. Keeping Zenitsu and Inosuke awake on the other hand you don't feel bad for. This is what they get for skipping out on their training.

On rare days when you're alone (Kanao has to attend to her Demon Slayer duties and Tanjiro gets unconscious because of the pain), you work out. You do sit ups, pushups, running around the Estate on top of the fence, practice your sword/dance fighting, and breathing. You have to get stronger for the Mugen Train arc and any future arcs you wish to survive. You're proud to say you've gotten a lot stronger and more confident. Confident enough to blow in the gourd.

"Ready, Tanjiro?" You asked. Around you are Tanjiro, Kiyo, Sumi, and Naho. Today's the day you're gonna burst the gourd.

"Let's do this!" Tanjiro nodded. The two of you took a deep breath and blew into the gourds. Your veins are popping out as you concrete all the air into your lungs.

"You can do it! You can do it! You can do it!" The butterfly girls cheered. Beads of sweat begin to roll down from your temple as you continue blowing. You can hear cracks beginning to break. But you don't know if it's from yours or Tanjiro's. Your question is soon answered when you see Tanjiro's gourd burst open.

"It broke!" Tanjiro exclaimed. A couple of seconds later, your gourd also burst open. You gasped before smiling at them. "You did it, (Y/N) chan! We did it!" Tanjiro celebrates while hugging you.

"Tch, this was too easy. Nothing can stop us now." You scoffed.

Naho pulls the giant gourd up. "Now all you have to break is this huge gourd!" She pointed.

"Yeah!" Tanjiro replied.

Spoke too soon. You gave her an awkward smile and then went back to celebrating your small success. "I can't believe we did it, Tanjiro! All our hard work is paying off!" You exclaimed. Tanjiro hugs you again as did the butterfly girls.

While everyone is still celebrating, Zenitsu and Inosuke are watching you all in jealousy. Oh, crap! This isn't good. First those girls are pushing my future wife to be with that creepy smiling girl. Then she's training with Tanjiro all night. And now (Y/N) chan is advancing so much that she might return to her duties sooner than later. I have to catch up to them! I have to get stronger for my (Y/N) chan! Zenitsu declared.

In the training room, Zenitsu and Inosuke are sitting in front of you and Tanjiro. You're quite proud of them for finally getting back into training.

"Tell us about the Constant Breathing thingy and how you two master it!" Inosuke demanded.

"I still can't sustain Total all day unless I put all my effort into it, but I bet you two can do it!" Tanjiro answered. He begins to demonstrate by doing weird poses and noise. Not gonna lie, you're cringing on the inside. "You go like this to make your lungs expand! When that rattles your muscles will go, 'boom!' 'boom!' You gotta stop it!" Tanjiro explained. Both Inosuke and Zenitsu looked depressed and dejected at him. "All that's left to do is train like crazy! I mean look at (Y/N) chan, she can sustain her breathing for more than seventeen hours!" He exclaimed.

Both boys begin to shake their heads like crazy.

"What Tanjiro said is true. When you begin to breathe, it's gonna hurt like crazy. But you have to push past your limits little by little. The most important part of this is to never give up. If you train like crazy, you'll see improvements in no time. I promise." You added.

A hand touches Tanjiro's shoulder making him freeze. Shinobu has entered the chat. "Now, now. We're talking about a basic skill, or should I say, a beginner's technique, so anyone should be able to do it. But it's also true that mastering it requires incredible effort." She further explained. She then walks over to Inosuke and kneels down to his level while putting her arm on his shoulder. "Well, since just about anyone should be able to do it. I was sure it would be child's play for you, Inosuke. But it seems like you can't do it. Even though everyone else can? It can't be helped, then, if you can't do it. Can't be helped, and that's that!" Shinobu teases.

"I can do it, all right! Why wouldn't I? Don't talk down to me, or else I'll rip off your breasts!" Inosuke threatened.

"Inosuke! You can't just yell around and threaten to rip a woman's breast off! Least of all to a Hashira!" You yelled.

"Shut up! I'm better than all of you!" Inosuke roared.

Shinobu ignores you two and clasps Zenitsu's hand. She gives him a close eyed smile, looking more beautiful than ever. "Please give it your all, Zenitsu! I'm your number one supporter!" Shinobu beamed.

Zenitsu's face went entirely red as steam blew out of his ears. "Yes, ma'am!" He shouted. You couldn't help, but feel jealous that she managed to convince these two to train. You and Tanjiro had been trying for weeks to get them to train, but to no avail.

"Alright! Let's all train together!" Tanjiro exclaimed.

"Yeah!" They shouted. All four of you got up and headed outside. You only took a couple of steps when Shinobu puts her hand on your shoulder, thus stopping you on your tracks.

"Hey, (Y/N) san. Don't you want to train with someone on your level? Someone like Kanao?" Shinobu suggested.

There it is again! Everyone in this mansion is trying to set (Y/N) chan with that smiley girl! At this point they're not even trying to make it subtle, Zenitsu thought.

"Sure!" You nodded, making Shinobu smile wider. The Hashira looks pleased with you. "We don't mind if Kanao trains with us. The more the merrier!" You smirked.

"Eh...I was thinking like you train with Kanao alone-"

"Tell Kanao we'll be outside!" You took off. As you're running, Zenitsu looks proud of you.

"Finally we get to spend time together, my Goddess!" Zenitsu cooed.

"We would've been if you hadn't skipped your training these past few weeks." You said.

"That's not fair! You know the Rehabilitation Training was very tortuous! Besides, even if I did attend the training, those girls will find some excuse to separate us!" He argued.

He's right about the second part, that you can't deny.

Once you get outside, you begin to do some sit ups rather rapidly. You're able to do 120 sit ups in one minute thanks to Total Concentration Breathing. Inosuke is lifting weights and Zenitsu is running on top of the fence. Tanjiro cheers them on while also concrete on his breathing. You halted your sit ups when you spotted Kanao outside.

"Kanao! Over here!" You waved. She turns around and smiles at you. But her smile drops when she sees the others are also there. She looks rather uncomfortable because of this. She still flips her coin to see if she has the chance to hang out with you. You see her stare at her coin before looking up. Kanao waves at you before heading back inside. "Kanao..." You softly gasped.

"(Y/N) chan, this may be a weird question I'm about to ask you. You don't have to answer it if you're not comfortable." Tanjiro said.

"I'm aware Kanao has a crush on me." You revealed.

Tanjiro's face got redder than Zenitsu's face was a few minutes ago. He suddenly avoids eye contact with you while playing with his thumbs. "Oh! So you noticed how she treats you compared to me and the others?" He asked.

"How can I not? I may not have a keen nose like you, but I can see the way her eyes brighten when she only looks at me. Though I think she's confused about her feelings towards me."

"She's not." Tanjiro has a serious look on his face. He points at his nose as he continues talking. "Like you just said, I have a keen sense of smell. She smells exactly like Zenitsu every time she looks at you. Kanao's feelings for you are genuine."

Now it's your turn to blush as tears of guilt begin to glisten your (e/c) eyes. "I...I think I confused her. In case you haven't noticed, I'm her only friend. I think we became friends back at Final Selection and I must've confused her."

"You two met during the Final Selection? When?"

"It was a couple of days after we got separated. I lost my sister's pin and Kanao found it. After I thanked her, I complimented her voice. I told her it was pretty. I guess every time I'm nice to her, she proceeds it as a romantic gesture."

"(Y/N) chan, do you have feelings for her?"

Your heart skips a beat as your blood freezes cold. You wiped your tears, thinking about this question. I can't believe I did it again. First I ruined Zenitsu's relationship with Nezuko and now I'm ruining Kanao's relationship with Tanjiro. What the hell is going on here!? I'm nothing special. I'm just a girl that got isekai to this world. Back in my world, no guy or girl would bat an eye at me. As much as I want my own harem, this isn't right. I can't alter their story. How am I gonna fix this?

"She's a nice person once you really get to know her. Something tells me she had a hard life and she struggles to show her emotions. I'm just trying to help her come out of her shell."

But you need to be the one to help her. After all, she is your future wife.

Tanjiro lightly frowns at you. He noticed you didn't answer his question, but he'll drop it for now. A sudden wave of emotions is coming from you. I'm smelling guilt and sadness from her. She's probably afraid that I'll judge her liking girls. But what's making her feel guilty? No matter what, I will always be there for you, (Y/N) chan, Tanjiro promised.

"I'm sure she is since I can smell her kindness deep inside."

But only for you, (Y/N) chan, Tanjiro added.

"Why don't you try to talk to her?"

"Huh?"

"It shouldn't be that hard since you need to spend one on one time with her during your Rehabilitation Training. So why don't you try to befriend her? I'm sure you'll like her once you get her to open up. Who knows? You may be the one who she'll have a crush on."

This is the only way to make sure to establish her relationship with Tanjiro.

"I'll give it a try, (Y/N) chan!" Tanjiro promised. But you're the one who has my heart, he added. You nodded and suddenly got up. You begin to head your way inside. "Where are you going?" He asked.

"To cry. Then I'll clean myself up because my red friend has returned." You revealed while pointing down at the red stain that is between your legs.

"Gah! You're bleeding!" Tanjiro panicked.

"Like I said, I'm gonna cry now." You repeated. You bow to him before skipping back inside.

It really sucks to be a woman sometimes.

After finally you stopped crying after two hours, you're laying in bed while still doing Total Concentration Breathing. You're thankful this type of breathing can also soothe the pain. As you're concentrating on your breathing, you hear a familiar flap next to you. You open your eyes and smile when you see Pedro. You scoop your crow up and hug him against your chest.

"Pedro, my baby. I missed you so much!" You exclaimed.

"Of course you miss me. I am the BAE after all." Pedro responded.

"You sure are." You chuckled. "So what brings you here?"

"Haganezuka san is here to deliver Tanjiro's new sword. He also wishes to see you before he leaves." Pedro said.

"Lead the way!" You piped up. Pedro flies out the window and comes right back inside, landing on your shoulder. You're proud you're raising a dramatic bird. He swacks orders at you to which direction you need to go. After a few turns, you enter a room where you see Tanjiro, Inosuke's sword maker (you don't know his name), and Hagaenzuka. The latter is lying comfortably on the ground. "Umm...you asked to see me." You said.

"YOU!" Haganezuka shouted, while pointing at you. He gets up and dashes towards you. You didn't have time to breathe when he had you in his grip.

"Don't kill her!" Tanjiro pleaded.

Haganezuka hugs you and turns you to face Tanjiro. He also posed behind you to show you off. "This, this is the ideal Demon Slayer! Why can't you be more like her!? You two started your journey together and she hasn't broken her sword! Unlike you, she's at least responsible for her weapon? Something you could never do because you're so careless! This is why (L/N) san is my favorite!" He ranted. During his speech, he had you flailing around in his arms. You are feeling the pain of your period because of this.

"Release my Queen, you himbo!" Pedro demanded. He bites the sword maker's hand causing him to let you go. Hagaenzuka howls in pain as he cradles his bloody hand.

"Pedro! That wasn't very nice!" You scolded. Oh my God! I can't believe my crow did that!

"You damn bird!" Haganezuka shouted.

You made Pedro apologize to him and called for Aoi to tend to his hand. After the fiasco, Haganenzuka is lying back down on the floor while giving Pedro a death glare. He probably is due to his body language since he's wearing a mask.

"I'm so sorry about this." You bowed at the other masked man.

"Well, Haganenzuka san is a very passionate man. So all of this is to be expected coming from him." He assured you.

"He also isn't afraid to play favorites." Tanjiro muttered.

"Anyway, my name is Kanamori. I was the one who forged Inosuke's swords." He introduced himself. All four of you looked outside to see where Inosuke is sitting on a ledge, holding his swords. He concentrates on his breathing and his blade begins to change color. "I would be thrilled if they prove useful in battle." Kanamori said.

"Hey look, the blade became a light blue color!" You exclaimed.

"The dull sheen of that indigo gray hue is so cool. It's a fine color for a sword." Kanamori stated.

"I'm happy for you, Inosuke, since your sword was chipped all over." Tanjiro smiled. You stepped behind Kanamori to prepare to grab him for what was about to come next. Inosuke picked up a rock and began to slam it against the blade. A loud clang is heard echoing throughout the Estate. Inosuke did it a couple of more times until his blade became razor sharp like before.

"Better." Inosuke stated. He continued to do the same thing with his other sword. Everyone's faces, but your's, exclaimed in shock. You have a small smile on your face while petting Pedro's red feathers.

"I'll kill you, you miserable brat! YOU'RE A DEAD MAN!" Kanamori raged. He tried to lunge at Inosuke, but you and Tanjiro held him down.

"Run...Inosuke..." You groaned. Man was this guy heavy. Even with Tanjiro's help, you're struggling to keep Kanamori at bay. This just means you have to work on your physical strength more.

It took awhile to calm Kanamori down, but he and Haganezuka finally left the estate. The sun is beginning to set as you watch them both walk away. Inosuke is holding onto yours and Tanjiro's back of your shirts. Once those two views disappear completely you begin to head back inside looking rather dejectedly.

"What's up with you, (Mispronounced name)?" Inosuke asked.

"It's just today was rather a tense day, don't you think? None of us had a good time today." You answered.

"Yeah, you're right. All this training, or in your case of yours and Zenitsu, lack of training is keeping us stressed out." Tanjiro agreed.

"I'm the King of the Mountains! There's no such thing as stress or being tense!" Inosuke exclaimed.

"Said the guy who quit training because he couldn't stand losing to a girl." You muttered.

"I heard that!"

"I wasn't whispering."

"You wanna fight!?"

"Alright...let's dance."

The two of you got into a fighting stance. Well you're doing a ballet pose since you can't actually fight.

"How 'bout we don't!" Tanjiro scolded as he got between you two.

"Oh my God! I'm a genius!" You suddenly exclaimed.

Both boys turn to face you, "Huh?"

"Gather everyone in the training room once the sun is completely set! And I do mean everyone, Tanjiro." You ordered.

"What are you planning?" He asked.

"Trust me, this will ease everyone's stress." You smirked.

You headed back inside, hoping for what you're about to do works. If you pull this off, then the tension would soon lift and everyone would get along well. Maybe you'll be able to repair a relationship with Tanjiro and Kanao. Bonus if you also repaired Zenitsu's and Nezuko's romance.You stopped smiling at the thought of that.

Stop that! I can't get in the way of their romance. Or any type of romance. I have to establish canon in order to keep the story stable. My only goals are to rescue Leo and save as many people as possible. I don't deserve any happiness. You slapped your cheeks a couple of times to compose yourself. The focus of your plan is for everyone to stop being stress out and to have fun.

The moon shines brightly as do the stars when the night has completely set in. Shinobu closes her office door and is walking in the hallway. Today was a long day for her, doing paperworks, check ups, eating wisteria flowers, experimenting, trying to set you up with Kanao, and reporting to the Master. Yep, she has been busy and now she wants nothing more to do is to have a relaxing night off.

As she's walking, she realizes she hasn't seen anyone around. There's no sight of Kanao, Aoi, Kiyo, Sumi, Naho, Tanjiro, Inosuke, Zenitsu, and you. It's not like for her adopted sister and the other girls to sneak off without telling her. You and Tanjiro are very serious about your training and recovery, so she's surprised you two have also disappeared. As for Zenitsu and Inosuke...she has low expectations for them.

"Where are the kids?" Shinobu asked herself. She runs outside to the garden, but it's met with silence. She goes to the hospital ward, but the beds are empty. She goes to the girls' rooms, but there are signs of them. Panic begins to set in. Calm yourself down, Shinobu. I haven't checked the training room. If they're not there, then I have to summon an emergency Hashira mission, Shinobu thought. The closer she gets to the training room, the more she hears a strange sound.

Wait! It sounds like someone is singing...Yep. Someone is definitely singing, but it sounds weird. Like, Shinobu can't understand what they're saying. Whoever it is that's