Training(

I woke up after God knows how long, and felt refreshed. Like I didn't just get beaten by chibi Rengoku, it was painful but he started training before me, so I guess that was a good learning lesson for me.

But my vision became better during the fight with rengoku but that was only for 5seconds before I got knocked out cold so does it really matter?

Guess I'm going to do some chakra control exercises, in the meantime, I had enough of sticking leaves to my skin, so I'm going to try and go tree climbing.

I got up to see rengoku sleeping, so I decided to go to a tree nearby and see if I can climb it, I started to do it but I slipped. I try again but I keep falling, so I decided to keep on doing it, it was not like I will fail forever.

I was right about not slipping forever, by the end of the day I could reach the top of the tree, and stay on it for a while, I can run up the tree and stay on it for like a minute or two tops, but now I feel tired. 'If only there was jutsu that could help me train faster and more efficiently.'

I thought to myself while going to bed to sleep because I'm exhausted,and who would say no to sleep?

I got to bed and slept well, I woke up and make sure Senjuro was well-fed, and say good morning to dad.

I went straight back to sparing and training with rengoku while also learning flame breathing cause last time it wasn't fair how I was getting beat so fast.

Timeskip 6month.

"Flame breathing First Form: Unknowing Fire" yelled a black hair kid

"Flame breathing Second Form: Rising Scorching Sun"yelled a flamed hair kid

Both of them clashed over in over again with great strength in speed.

I smiled at Rengoku in said, "let's turn this up a notch" my eyes turned red with 2tomoes in one eye in one tomoe in the other.

Everything slowed down immensely my vision got so much clearer, I could see anything including rengoku running at me, at a snail speed, we made eye contact and we clashed again.

He goes for my shoulder, and I block him and attack his leg he blocks it, and tries to get my gut with a kick which I dodge.

He performs a downward slash while yelling "flame breathing Third Form: Blazing Universe"

I blocked his attack while saying "flame breathing Second Form: Rising Scorching Sun"

We clash but he smiles kicking me in the gut and hit me with a "flame-breathing Fifth Form: Flame Tiger"

When I open my eyes his wooden blade was in front of my face but I just smile as i disappear like I was never there.

When he reopens his eyes he sees he is the one on the floor while I'm smiling at him.

"The score is 100 to 120 in my favor," I said proudly

"You did great as always keep it up" Rengoku replied while I help him get up

We went to the dining area to eat to see dad in a demon slayer outfit in drinking.

Wait I thought he retired but considering that He was hashira while Sanemi was a hashira it makes sense, I feel bad for the demon he kill imagine getting beat by someone that drunk.

Dinner wasn't interesting but after it, I played with senjuro for a while.

When I was done with that, I looked over all my progress over the past 6months, so during those 6month I master tree climbing and I have the basic 3jutsu you need to graduate from the academy in Naruto.

I got 2tomoe in one eye in one tomoe in the other, I have basic ninjutsu and I mean basic. I master flame breathing to like the intermediate level, I also feel like because I'm here rengoku getting way stronger than he was supposed to be.

I don't mind tho that's good for him. I'm going to be 19 by the time that cannon start so if I improve at this pace I could probably save the tanjiro family to survive Muzan attack.

I will be 15 when Shinobu's older sister dies at the hands of upper moon 2, I can't do anything about it right now because I don't know where they live.

I think we gonna take the demon slayer test in a year and 6 months the timer counting down till I get to kill a real demon I'm excited.

A/N I wonder how much his existence is affecting everything