Accompanying a demon

                                    

                                          
Edited: May 26, 2021
                          
***
                          
Changing into your uniform, tying your hair into a ponytail, and wearing your red floral patterned haori. You were now ready to start your first mission.
                          
You look at Tanjiro, checking out his checkered black and green haori on top of his uniform. "You look good, Tan-nii!" You compliment, giving him a thumbs up.
                          
He smiled at you and replied, "Thank you, the uniform also suits you.
                          
"Have you two gotten change?" Urokodaki asked.
                          
"Yes." You both replied.
                          
Urokodaki checked both of your attires, looking up and down the finally nodding his head. "Tanjiro, (Y/n), now that you two are starting with the Demon Slayer Corps, I'd like to explain a few things to you kids."
                          
"Right."
                          
"That Demon Slayer Corps outfit you're both wearing right now... It's made of special fiber and it's quite breathable plus it repels moisture and won't burn easily. A low-level demon's fangs can't even tear that uniform." Urokodaki explained.
                          
You touched the fabric of the uniform and thought, 'So, it's that strong?'
                          
"Also, that Nichirin Sword of yours..." Urokodaki directed his gave to Tanjiro. 
                          
"The color varies from owner to owner and each hue has unique properties. But since it's rare for people to have black blades, little is known about them. So little, in fact, that-"
                          
"Little is what?" You questioned.
                          
"Black blades are said to be wielded by a swordsman who will never go far." Urokodaki finished. 
                          
This shock you and quickly said, "What?! I don't believe that, I'm sure Tan-nii will prove them wrong."
                          
Hearing this made Tanjiro smiled, "Thank you, (Y/n)...I don't know how I'll do in the Demon Slayer Corps, but me and (Y/n) promised each other to turn back Nezuko into a human no matter what." He glanced at Nezuko, hidden in the covers of the mattress.
                          
"I have faith that you two will make that happen. One more thing. Take this." He showed you two, a wooden box.
                          
'Hm...what's this, why a box?' 
                          
"It's a box to carry your sister in during the day. Built out of an extremely light wood called "Cloud Mist Pine." I coated it in rock lacquer to reinforce its exterior." He explained. You pick it up and were surprised at how light it was.
                          
"Wow! It's true it's so light! Thank you Mr. Urokodaki!" You showed a smile of gratitude, picking up the wooden box and place it on the floor in front of Nezuko. 
                          
"Ne-chan, will you please get inside this?" You asked. She was hidden in the covers but slowly move towards the box but retreated, she tries again pausing in the middle before successfully getting inside the box. After that you slowly closed the small door, leaving a small crack.
                          
"Ne-chan, we're not gonna be separated during the day anymore, isn't that so great?" 
                          
Tanjiro lean in to look at Nezuko and said, "(Y/n) is right, we're gonna be together from now on." After that final talk, you finally slid the door close.
                          
***
                          
"All right, we'll be going now."
                          
Tanjiro has the wooden box around his back. Standing in front of Urokodaki's house, you slowly looked around, putting it into memory because it'll probably be the last time that you'll see it. Urokodaki walks in front of you and Tanjiro.