"Good and Evil" Demon Slayer x Male Reader - Prologue Part 1, and Part 2: "Twins." And "The Sun's Story." - Page 6 (2024)

 
That's when I met a horrible sight. 
Uta was on the ground dead, his body ripped to shreds. I cried, and cried. To see my lover dead. After I buried his body, I later on I found demons existed, and I knew that Uta was killed from a demon. I promise my self that I would kill all demons, and their created.
I created a breathing style. Which is Sun Breathing (日の呼吸, Hi no kokyū). After couple of months, of training and learning about demons, I officially began hunting any demons. That is until one night. A pile of dead samurais in a forest, and the demon was their. But the most shocking was of a familiar face.
It was my twin brother, Michikatsu Tsugikuni. About to be attack by the demon. I quickly killed the demon before he harmed him. I stayed silent when our eyes meet, and later apologized for not being there early as I bowed. He stared not saying anything from his shock. He said what did he saw. I told him everything after I left. He didn't show any emotion. But told me to teach him.
I trie to teach him the sun breathing, but he couldn't use it. That's when he created alternative, which was called Moon Breathing (月つきの呼こ吸きゅう, Tsui no kokyū). 
A year later, I decided to teach other people our breathing style. I tried to teach others my breathing. But they couldn't perform a single style. That is until they performed their own. They were called: 
Flame Breathing (炎ほのおの呼こ吸きゅう, Honō no kokyū)
Water Breathing (水みずの呼こ吸きゅう, Mizu no kokyū)
Thunder Breathing (雷かみなりの呼こ吸きゅう, Kaminari no kokyū)
Wind Breathing (風かぜの呼こ吸きゅう, Kaze no kokyū)
Stone Breathing (岩いわの呼こ吸きゅう, Iwa no kokyū)
With that, they could fight back.
See Also
Demon Slayer: Akaza's Blood Demon Art, ExplainedYūgen - Chapter 2 - musingsofachilles - 鬼滅の刃New Path in Demon Blood - Chapter 1 - Jadensstorycolection - 鬼滅の刃Hashiras react to power levels | KNY
Years later I met someone, and that someone was none other than, Saya, The Demon Queen. That's when I released, that I was destined to defeat this monster.
When we were fighting, I found something disgusting in her body. That she has 7 hearts, and 5 brains moving in any location in her body. I decided to combine all forms, and overpower her. I look at her eyes, seeing the fear and anger in her. That's when she split using the remains of whatever power she had left and divided her body in a powerful burst. Though I was able to destroy nearly all the fragments, the pieces I missed escaped and allowed Saya to regenerate again.
Saya wasn't alone though their was another demon with her side. That demons name is Tamayo, I found out that she hated Saya due to her yelling her name out of anger. But she didn't die from it, probably since Saya was weak from her power the curse disappeared from Tamayo. I decided to let her go.
But when I return from the Demon Slayer Corps. They were in anger. Since Saya escaped, letting a demon escape, and the most shocking. My brother betraying the demon slayer corps, and turning into a demon.
I decided to take all of those problems my self by not fighting. I was kick out of the corps, the master of the corps was young, so he couldn't do anything.
It's been months that I was kick from the corps, and yet I still continue to hunt demons. That is when I met you.
End of Yoriichi POV
"Wow.. I'm sorry for what you had to put on." Said (Y/n).
"Don't be, it's my fault for not finishing Saya." Said Yoriichi.
See Also
Demon Slayer: 11 Best Kasugai Crows, Ranked
"No I'm truly sorry. It's just that, Saya wasn't very cruel, she did had a bad nature. But not that far. She was kindly obsessed with me. But when she turn into a demon. It went far as to love me. I still don't know why though, I been trying to find a reason but not a single idea came though me." Said (Y/n).
Yoriichi stayed quiet from listening to him.
"Anyway, can I ask a question. Where are we going? We been walking for 15 minutes already and didn't said anything to me." Said (Y/n).
"We're going to visit someone, probably the only nice person and friend I ever had." Said Yoriichi.
"Who?" Said (Y/n).
Yoriichi stayed quiet.
(Y/n) wanted to ask again, but didn't. 
Timeskip
 
(Y/n) POV
Both I and Yoriichi see a house on a forest.
"Sumiyoshi, I arrived." Said Yoriichi.
I heard from Yoriichi. I then see a man with red hair with a ponytail and a green and black haori that are square. 
"Oh Yoriichi, you came." Said Sumiyoshi.
"(Y/n) meet Sumiyoshi Kamdo, my friend. Sumiyoshi meet (Y/n) Kibutsuji." Said Yoriichi.
"Nice to meet you." Said (Y/n).
"Nice to meet you too." Said Sumiyoshi.
 
           
 
 
Prologue Part 2: "The Sun's Story." End.
3558 Words.