"What's gross is gross!"

Y/N woke up from her nap by being squeezed into a hug by Zenitsu.

"What's wrong, are trying to escape from your medicine again?" She said while rubbing her eyes, she opens them again only to see Murata sitting in front of the beds.

"Who are you?"

"We met at the natagumo mountain! Did you already forget about me?!"

"… Yeah, I remember. Kurata, right?" Y/N responds in such a robotic way that it was clear that she didn't remember.

"It's Murata!"

"What are you doing here?" Tanjiro questions.

'I was called to report what happened in the natagumo mountain, it was hellish! The hashira are terryfiying!" Murata starts to ramble.

"Are they really that scary?" Y/N comments, Murata and Tanjiro looked at her like she was an alien.

'She did call the wind hashira bug eyes though, so she probably has a very bad sense of danger.' Tanjiro thinks.

"They were all angry, they said corps fighters these days are dropping in quality. It seems that some of the slayers in the mission didn't obey orders, so they asked me who their trainers were. The hashiras are really scary!"

"Hello!"

Shinobu suddenly appears behind him.

"Hashira! Kocho-Sama!"

"Hello."

"ah! Hello! Goodbye!"

"Ara ara, goodbye!"

After the boy left the room in a hurry, she turned to us.

"How are you all feeling?"

"I'm feeling a lot better, thank you for asking."

Y/N went back to sleep while Zenitsu was still hugging her. 

You know that feeling when a cat/dog start to sleep in your lap, and you just stay stuck in place forever because you don't want to wake them up? That was what Zenitsu was feeling.

"Then it's about time to start rehabilitation training!"

"Rehabilitation?"

♡

Shinobu was quite surprised when Y/N explained about how she never had any type of training whatsoever, so instead of doing the rehabilitation training, she would have to learn since the basics.

Unfortunately, Shinobu hands are tied with the work of taking care of the injured, so another hashira will have to train her.

And the hashira who's currently available right now is....

"Oh, it's the bug-eyed guy!" Y/N said, pointing to him as soon as she saw him entering the training area.

"Don't tell me…the super important student who needs a teacher is this brat…"

Shinobu gives a smile in response.

"Of course! If she killed a lower moon without ever learning how to fight, then how powerful would she be with a proper training? I'm entrusting her to you, bye!"

"Wait!" He exclaims, but she quickly leaves.

The two just stayed there looking at each other awkwardly.

"I'm leaving." He started to turn away.

"Eeeh? The so powerful wind hashira can't handle a small girl? Oh, I know! You are feeling sheepish because of how you embarrassed yourself in front of the master in the last meeting right?! Don't worry, I totally forgot about it! I only laughed about it three times this week!"

"You brat-" He turns back in a scary speed.

Now, instead of just leaving her on her own, he would just make her go through hellish training.

While going through her training, Y/N really wished she would have had more healthy habits in her past life.

"How…huff…how many rounds was it?"

"You only did two rounds around the area! What the hell?! Even a normal civilian would be able to do more, how did you even kill a demon with such a weak body?!"

"Shut up! You look like an old man with this white hair of yours! How old are you anyway? 90?"

"TEN MORE ROUNDS!"

"NOOO!"

♡

Y/N was feeling like Saitama from one punch man with all this training, at this point, she really believes Sanemi wants to kill her.

And about Sanemi, he really was confused about the girl body composition.

When it came to physical training, she really sucked at it, the girl could barely do one push up.

However, when they sparred for the first time, she totally wrecked him, of course, only in the first attempt since he had his guard down.

But even with his guard up he had to actually put effort in winning. How the hell someone so physically weak can put him in a tight spot like this?

When Shinobu said she could be really strong with proper training, he only interpreted it as an excuse to throw the girl at him, but now, he actually believes that the girl might turn into a scary person when she finally master total concentration breathing.

The thing is, she doesn't seem to be compatible with any breathing style, and when he asked about which breathing style she used to kill Rui, she said the name of a breathing he never heard before.

Seraphic breathing.

There is no register of such a breathing at all.

Everything about this girl was a mystery. He actually considered her to have cahoots with Muzan, but…

"Wow, this cloud look like a pretzel...it's kinda making me hungry..."

She's too much of an airhead for it to be possible.

"Do you remember what you felt when you killed lower moon six? The way that your lungs expanded or how your blood boiled?"

"…. I think I do."

"Do you think you would be able to use your breath in this dummy here? It would be nice to have a view about how it works."

That voice before said she would die if she used it more than one time, but…that was only when she was severely injured, and her body is completely healed now, and also, she never heard the voice again after that.

"I suppose I could try…" She mumbles, taking her sword and entering the right position.

"Seraphic breathing, first form : absolute severance."

A clean cut was made across the dummy, cutting it in half perfectly.

Not only the dummy, but the ground under it had a scary cut mark like a bear had clawed it, did just the wind liberated from the sword did that cut?! No wonder she killed that lower moon so easily, that breathing style is enough to cover her lack of strength.

However, her current body was never trained properly to withstand total concentration breathing.

So, just like before, her nose started to bleed.

"Sanemi, I think it's better to call someo-"

She passed out again.