My potential(

Last time in demon slayer

One day a man joined the demon slayer corps I taught them breathing techniques, that helped the demon slayer have more chances against the demons. in be able to compete with the Uchiha physic.

No one was able to master the breathing technique that he use except for the Uchiha clan because of their amazing physic, they learned sun breathing from him, but the man brother became a demon, even tho it wasn't his fault the corp wanted him to commit seppuku but the Uchiha defended him, In wanted to leave because how dumb that decision was, the corp saw the reason behind the Uchiha words in the man stayed in the corp till his last day living day in even making a family.

This man's name was Yoriichi Tsugikune the sun-breathing hashira.

Now we continue

'So that's how the clan was created' I pondered

The book also talked about seal techniques that could help me get stronger and faster.

I closed the book and saw a book title seal laying on the floor. They were also another book on the floor called gates, but two of them got my attention the first one that got my attention is the book that said "flying rajin" and the second book said "sun breathing" I grinned, this is great, 'thank you for whoever wrote those down I own you a lot ' i thought to myself

I took the book named medicine and the book named seals, i turned on my Sharingan, and made 3 shadow clones. I made the first one study the seal book, the second one study the sun breathing book, and the third study the medicine book.

While I go to bed to get some much-needed sleep.

Around 5am.

I woke up early in the morning, in my clones were still studying the book that I left them.

I stretch a bit, before getting out of bed. I then decided to poof the clones one by one.

Poof, the first clone poof out of reality I get knowledge about how to use herbs to make some basic medicine if I'm in a pickle.

I poofed the second clone and I got to know the basic kata for sun breathing in how to practice it, while getting better at using it.

The last clone poof in I learned that I need to up my calligraphy to be able to get it to a higher point.

I open the books at a gate while feeling a bit light head. Then I saw the one word that I thought I wouldn't see in this chakra-related book.

On the gates book, it read "anyone can practice this technique it is not limited to the clan, anyone can learn because it only required physical training, to unlock their full potential"

I was giddy, I can already imagine it now All the hashira using the gates while fighting a upper moon"

I looked down at the tiny label that I could only see because of my Sharingan, this technique grants a greater boost to the member of the clan.

I open the book about the inner gates, and

got to know the basics of how it works and how to practice it, I closed the book in put it down somewhere in the room.

I went outside my room and walked around, I knocked on the door that had the butterfly in it, and after a few seconds I heard Shinobu's sleepy voice saying" who there"

"It's me Atoru, I wanted to know where you put my Nichirin blade," I said

"It's in here next to the closet, "she said

"Why is the sword near a closet" I sigh

"Anyways, can I get it," I said

"Yeah, sure, "she said

I open the door to see a fairly decorated room, I saw my sword near the closet.

Shinobi looked sleepy, she had a sleeping dress on,   In looked a bit tired in annoyed at the person that dare to wake her up.

I took my blade, in went outside the room to go outside safely, when I got outside .

I started to do the kata for sun breathing.

"One, two, three, four, five" I repeated as I started to do the katas over in over again.

I memorized everything on the book in if I made a mistake, I would see with my sharingan in fix it.

7 in the morning

"You are practicing so hard in the morning,What the occasion"I heard a familiar female voice.

"I'm practicing something " i said

"So I was right"she said

"About what exactly" i said not stopping

"Only a member of your clan can open this books,huh"she said

"It was an interesting, I learned a lot "i said

"Did you learn anything"she said

"Yes,I did"i said pausing before saying"I want to try something out, do you mind sparring with me"

"Sure" she said before taking out her sword

We got into the training area.

"Ready"i said

"Yes"she reply

"Go" i said as i lunge at her with my wooden sword.(A/N not a real sword,it only a spar no need to draw blood)

"Flame breathing first form:unknown fire"i said while getting closer to her.

"Flower breathing Second Form: Honorable Shadow Plum"she said deflecting my attack with agility in grace.

She retaliate by using "flower breathing Fifth Form: Peonies of Futility"she said unleashing  a flurry of nine consecutive attacks that flow and weave in on themselves.

I stood there in dodged everything easily ...'everything is so slow'I thought as I decided to use a bit more force.

I rushed at her,In disappeared from her sight.

I appear behind her before she notice and said "boo"

"Ah" she yelled before slashing behind, I dodged the hit by leaning back.

"Why did you do that"she said flustered

"Cause I can"i said jumping away

"Flower breathing final form…."she try to said but I appear in front of her in punch her in the chest making get on her knee to cough.

"What you were trying to do was dangerous in too far for a spar" i said before continuing

"Flower breathing seem like a good breathing style but my eyes see everything "i said pointing to my sharingan

"it Can see that if you use that last form you will damage your eyes beyond repair" I said

"I can help you if you want to be stronger," I said smiling

"Why would you do that for me"she said

"Why wouldn't I help you," I said

"Here is a book, read everything that is in it, it talks about a technique that I'm going to share with you to help you and your sister because she can't cut a demon head," I said tossing her a book about the inner gates

"What are the inner gates," she said looking at it

"The Eight Gates exist in order to limit the flow of chakra within an individual's body. Ordinarily, individuals can use no more than 20% of their body's full potential, the brain's way of protecting the individual from harming their body through overexertion. With training, individuals can learn to remove these limiters, referred to as "opening" the gates.With each opened gate, individuals are given access to more and more of their body's chakra, thus increasing their physical strength and speed."I said.(again copy and pasted)

1.2k words

A/N I kinda realize that I was kinda stopping him from reaching his full potential so after the time skip he going to be broken.