Reborn in demon slayer as an Uchiha

Total concentration breathing()

Last time on demon slayer

I gave her back the piece of paper with my info on it.
"So what was the plan for me to do," I said
"First you must master total concentration breathing constantly not just have it on while fighting for a brief moment it must be on at all times," she said before taking in a deep breath in letting it out while saying"so we are gonna train you using pots in your goal is to blow in them until they exploded, "Kanae said looking serious once again

"Oh ok so when do we start"i said getting ready
"Now," she said as she pointed at a bunch of jars in the corner

In now we return to the present
I breathed in deeply in try to put air on the pot till it break in the small pot broke pretty easily
"I'm done with the small one what next, "I said
"Here the medium pot try your best"said Kanae while handing me a bigger pot

"Ok," I said taking the bigger pot,  and repeating what I just did, I repeated the process with a bigger pot in another one till Kane said
"You are going to activate total concentration breathing in keep on at all time even when you asleep "she said
"What was all the pot-blowing thing about then," I said tilting my head to the right

"That was just for me to see your lungs capacity we don't want you to have no endurance at all no woman would want a man like that," she said smiling

"When the hell did we get from breathing to woman," I said seriously confused

"I'm joking with you it to see how big your lung capacity are at right now"she said smiling
"Ok so how do you plan to monitor me to make sure I have it in at all times," I said,

"The best person that can help you with that is my little sister Shinobu she will hit you every time you turn it off," Kanae said smiling

"Are you a sadist?" I said
"What that "she replied
"Nothing so how is she supposed to hurt me when I am so durable," I said
"Turn off your chakra because you may run out of it in a fight in have to use only your physique in without it boosting your defense she will be able to damage you," she said
"So when do we start that"i said
"The second you start the exercise," she said
I breathe in deeply in said under my breath "total concentration breathing "
"You know you don't have to say it when you use it right"she said looking amused  I ignore her
"What do we do while I have this active," I said

"So first you going to run laps around the butterfly mansion, with a very big boulder behind you and then you going to do some push up with some weight in your back in to finish it you going to do some jumping rope (A/N I used a translator for this part so if it wrong tell me)that about it for physical training," she said

"That seem a bit much"i said
"You don't have the stamina to do all that in here I thought you were a stamina monster" she said laughing

"You messing with aren't you," I said
"You only here for 7 days at the least, and you may never come back so let me enjoy myself "she replied
"I have nothing to say also you said physical training what next, "I said

"There some meditation here in there plus you going to help me heal some demon slayer later on. I will teach you the basics so you don't die of infection later on, "she said walking away

"Also start when Shinobu gets here she gonna overseas your training I have some healing to do," she said

5minute
I see a short girl with black hair but purple at the end of it, she has purple eyes with no sign of pupil wearing the demon slayer outfit underneath a butterfly jacket.

"So where are the rocks that I'm carrying "I said to the little girl
"Over there"she said pointing behind her
I look behind to see that she was carrying some pretty big rocks which I took in and put on the mini chariots on the floor then I pick them up in threw them on my back

"Your goal is to get there faster than me"she said
'How hard could it be'I though
"Ready in go," she said dashing away I ran after her but I noticed that she was checking my breathing while I was running 'how that's how she can notice if I stop'I thought racing the little girl

A/N like I said the next few chapters are just him improving no fighting in this also help me experiment a bit testing the water you may say