You, Douma and Rui were doing your training routine as you wait for Tanjiro and the others. The three of you were in a shaded area in the yard so Douma and Rui won't get hurt by sunlight.
"I wonder what's taking them so long." you said as you practiced Total Concentration Breathing. "They lost motivation when they got defeated by Kanao-san." Douma replied as he helped Rui balance himself in a handstand position.
"Well, I still have to work on keeping up the Total Concentration Breathing technique all the time." you said as you did the technique but fell to the ground in pain. "(Y/N)-chan/ (Y/N)-neesan!" Douma and Rui called out in worry as you tried to stand up.
"I can't do it. It's too difficult, I feel like I'm about to die. My lungs hurt and my ears are ringing like crazy! " you exclaimed as you held your ears in pain. "Don't give up, (Y/N)-chan! You can master that technique in no time!" Douma encouraged. "Yeah! And we'll be here to cheer you on, (Y/N)-neesan!" Rui added with a smile as he looked at you upside down.
"Thanks, you two." you painfully smiled at their reassurance as you regained your composure and turned your back towards them. 'Even though they cheer me on, I'm still scared! I thought my heart had burst through my ears! It's so painful, I'll never make it at this rate!' you thought as you felt tears forming in your eyes.
Your vision changed as you saw Michikatsu and Yoriichi looking at you in worry.
"If you're having trouble, you go back to basics." Yoriichi said.
"Breathing is all about the lungs. If you can't get the hang of it, that means your lungs are too weak." Michikatsu added.
'But it's difficult!' you thought.
"How about a motivation. If you managed to do it, I'll give you chocolate." Yoriichi suggested while Michikatsu looked at him. "That's not motivation, that's negotiation. You're treating her like a puppy." Michikatsu replied.
"I'LL DO IT!!" you yelled out as your vision returned to normal. You noticed Douma, Rui, and the three butterfly girls were looking at you as your face flushed in embarrassment.
"That's the spirit!" Douma cheered as he let go of Rui, making him fall on his back with a thud. "Ow!" Rui cried out as he rubbed his back in pain. "Rui!" you stated in worry as you went towards him and helped him up. "I'm sorry!" Douma apologized quickly as he helped Rui.
"(Y/N)-san is working hard every day! Same goes for Tanjiro-san!" Kiyo exclaimed.
"Yes! Let's bring them some rice balls, okay?" Sumi replied.
"Good idea! And also...." Naho trailed off.
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"Blow into these gourds?" Tanjiro asked as the three butterfly girls gave you two a gourd each. You drank the tea Naho gave you as you listened to the girls. Douma and Rui looked at the gourds in curiosity as they sat near you, under the shades.
"That's right! Whenever they trained Lady Kanao, Lady Shinobu and Lady Kanae often had her blow into gourds." Kiyo exclaimed. "Really? That's great!" Tanjiro said as he munched on a rice cake. "So, you make some kind of sound?" you asked.
"Oh no. She blew into it to make the gourd explode." Kiyo replied as you stared in shock. Douma and Rui looked at the girls as if they were joking but they weren't. "Explode? What? You mean this? Something this hard?" Tanjiro asked in shock. "Yes! Not to mention, this is a special kind of gourd, so it's harder than normal ones." Kiyo explained.
"The gourds get bigger and bigger as you progress. The one that Lady Kanao can explode right now....." Kiyo trailed off as the girls went to retrieve something while you sipped your tea. "is this gourd." Kiyo finished as the girls showed you all a giant gourd. You choked on your tea when you saw the gourd. "Gigantic! / It's big!" you and Tanjiro said. "We'll give it our all!" you both exclaimed.
"I wanna join as well!" Douma exclaimed. "Me too, me too!" Rui added.
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You, Douma and Rui trained yourselves harder to be able to blow the gourds. You were hesitant to let Rui join you but he told you that if Douma can do it, so can he. He also told you it will be a step forward for him to redeem himself. You and Douma then taught Rui how to do the Total Concentration Breathing technique and how to maintain it. You also taught Rui how to swing a sword.
Tanjiro joined the three of you in the yard. You and Tanjiro raced around the mansion's garden, dodging and avoiding any obstacles like it was the mountain Urokodaki trained you two in.
It was now night time as you sat in your room, meditating. You were able to maintain your stamina but still had difficulty in maintaining Total Concentration Breathing. Your eyes were closed when a vision appeared.
You found yourself sitting in the middle of a field. You watched in awe as the sun was beginning to set.
"(Y/N)!" you heard a faint voice calling out your name.
"(Y/N)!" another voice yelled as it began to get louder but you continued to watch the sunset.
"There she is!" A voice exclaimed.
You turned to see Michikatsu pulling Yoriichi along as they both looked at you. "Michi-nii, Yorii-nii." you said.
"What are you doing here?" Yoriichi asked as he and Michikatsu sat down on either side of you.
"I'm just thinking about the three of us." you muttered. "What about it?" Michikatsu asked. "What if something bad happens that caused the three of us to separate and leave each other. I can't lose the two of you. You guys are the only ones I have." you said as tears started to form in your eyes.
"We won't let that happen. We promised to protect you from anything no matter what." Michikatsu replied as he ruffled your hair.
"If we somehow do get separated. Don't lose hope, (Y/N). If you ever feel lonely or troubled, look at the sky. I'll be your sun and Michikatsu will be your moon. We'll be there to guide you and watch over you." Yoriichi informed as he patted your head.
Michikatsu and Yoriichi had on a gentle smile as they both engulfed you in a giant hug as tears fell from your face. "We'll be here for you, (Y/N). We promise you that." Yoriichi said while Michikatsu wiped away some of your tears. You hugged the two in return. "Thank you, Michi-nii, Yorii-nii." you replied.
You opened your eyes as you gazed up at the window to see the starry night. You stood up and headed to where Douma and Rui resided in. You slowly opened the door to their room and took a peek inside. Rui and Douma were asleep as Douma held Rui in a protective hold.
You smiled at the sight and let out a sigh. 'I got to maintain Total Concentration Breathing and master it, but how? Guess I'll go take a walk to clear my mind. This is becoming really stressful. ' you thought. You looked back in the room and gently closed the door.
You walked out of the mansion and headed towards the yard. You sat down on the patio and looked at your surroundings. "First, the visions of the past, then the information about getting reincarnated. Urgh! Why can't things be a bit clearer." you said to yourself as you laid down and watched the sky. " 'If you ever feel lonely or troubled, look at the
sky.' " you repeated as you gazed at the moon. "Yoriichi will be my sun and---"
"I will be your moon."