The Darkness Hashira (demon slayer females x Male reader)

[4] A Promise

Once I woke up, I was inside the house, I turned my head to the side slowly to see that Yami-sensei was back... His also retired crow which didn't leave his side after he was retired must have informed him of the Demon that attacked us... But he was too late

He held Robin by the shoulders, white bandage around her eyes

"listen Robin... I'm sorry I wasn't there... It's my fault for leaving my students on they're own... I was foolish" he muttered and looked down

Despite seeming to be in a depressed state, Robin mustered a small smile

"it isn't your fault sen-" she tried to reassure Yami-sensei but was interrupted by me

"it was my fault sensei... I felt light eminating from the demon but I didn't think of turning Robin away from the blinding light... If I thought faster and acted sooner she would have been okay now... It's my fault and I'll take any punishment" I said as I looked down, my hands clenching my black haori

Robin turned to the direction where she heard me speak, her mouth was wide open in shock... She was probably surprised that I took the blame straight on without hesitation

Yami-sensei nodded at me

"as much as I'd like to say stuff like 'it's not your fault' or 'you're just a kid'... I can't, you are a demon slayer in training and you acted immaturely... Your punishment... A year in the wild, I won't allow you anywhere near the house, myself or Robin... So get that, you'll be all alone" Yami-sensei said coldly, this being my first time I've ever heard Yami-sensei being so cold

I looked down and stood up from the bed, picked up my katana and started to walk... But then I heard Robin speak out loud

"no! It was my fault!... I stared at the damn thing! I didn't even close my eyes! It's my fault... Y/N was just protecting me" Robin said, tears running down her cheek

Yami-sensei comforted her and quietly pointed at the door to me, I took the hint and felt

The year was kinda tough, I had 0 survival skills but overtime I learned to get food and clean water.

Most of my days I'd perform the same training I would back at sensei's home and tried to create more forms to my own breathing style.

Needless to say, my potential was really incredible as I got stronger, faster and more durable quickly, my sword skills starting to reach the mastered state and my breathing gaining 2 more addictional forms, not only that but I could hold my total, concentration breathing for several days now which was increadible for me.

I would also meditate and reached a state of mind... That can only be described as transparent.

Well not completely, my demon slayer knowledge told me that I needed to awaken my demon slayer mark to fully access it... But I got the concepts and glimpses of it at least.

And so the year passed... But I didn't return back to Yami-Sensei... I thought of going to final selection as I was, I was 7 and a half now so I was confident in taking care of myself out there... Maybe

I was sitting near a lake in a cross legged way as I looked at the day sky, then my mind almost predicted that I'd be chopped in the back of the neck from behind as I managed to avoid it... It was Yami-Sensei

"I told you your punishment is living in the wild for a year... Not less and definitely not more" Yami-Sensei said as from behind him, a now 8 and a half year old blind Robin walked into the view

"Y-Y/N... I missed you... Please return" she said, hoping to hear his voice after such a long year

I sighed