You are an demon slayer who has been with the core as long as you can remember. Being trained by kypjuko Rengoku and Sanemi Shinazgawa you learned Flame Breathing, WInd Breathing and even created your own breath style.
(I don't own demon slayer obvi...
Y/n woke in his futon. Got out of his be and looked in the mirror, his handsome face was incredibly was incredibly pale and his hair was as white as freshly fallen snow despite only being 17. But it's always been like that. He stared briefly at his lime green eyes.
He walked out his room into the kitchen where he began to eat breakfast. It did not take long for Kojuko Rengoku came out with her night kimono as her bright smile remained plastered on her face. "Hello my student."
"Hello sensei Rengoku," said Y/n.
"Eat well my student for today train hard."
"Just like yesterday?"
"Exactly!"
"Flame breathing: second form: Rising scorching Sun!" said Rengoku as she swung her flame cover sword up.
"Flame breathing: third form: Blazing Universe!" Y/n shouted as he wooden sword erupted in blue fire as swung his it down. The blazing swords clashes and one could hear the two swords clash.
Both demon slayers began a close quarters swords fight that look like to lights dancing with each other. Y/n jumped back, Rengoku immediately her student appeared behind her student. Y/n spun as he swung his sword covered in blue fire.
Rengoku disappeared and reappeared before she swung her wooden katana and stopped short of her students neck. Y/n was frozen from fear for a moment before falling on his butt. He was panting trying to catch his breath.
"Excellent work Y/n, your flame breathing has improved!"
"Thanks Rengoku sensei," Y/n said.
Suddenly a parrot flew in and landed on Y/n's hand. "Raaa, demon in nearby village."
Y/n put on his gakuran jacket, put his belt on and put his three swords in it. "Ok, Rengoku sensei, I'm going."
"Return soon my student," Rengoku before quickly planting a kissing him on the forehead. Y/n blushed before before his head and face in and a goggles on his eyes.
He headed towards the village, as he did he thought about how intense his training was. "Man Lady Rengoku's training is intense. She not as a bad as Shinazugawa, dam that woman is intense and just such a bitch! I wish i could train under Gyomei Himejima she's nice and pretty.
Suddenly he came across the town as the sun was setting as he walked through the town he took off his cloth and goggles. Walking through the town he had an eerie feeling as the fog at his feet slowly rose and rose.
Suddenly he hear a creepy feminine laugh. Y/n turned around to see
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[PastelBluePengu on amino]
"You're quite a hottie," she said.
"So I've been told," Y/n responded.
"I've been searching for someone as cute as you to be my lover and I think I've finally found him," the demon said.
"Really? Well I'm glad it's not me?" Y/n joked.
"You joke now, but soon you'll be all mine forever and well spend the rest of eternity in bliss as we dance in the fog," the demon said.
Y/n grasped his one of his sword, pulling out his white colored katana. "Wind Breathing: second form: Claw Purifying Wind." Two sharp crescent shaped slashes of wind that cut the demons arms of.
She screamed in pain as he zoomed towards her but she jumped back and disappeared into mist. She reappeared fully formed. The mist surrounded her hands formed weapon like claws.
Y/n jumped back sheathing of sword and pulling out another. Flame Breathing, his y/c sword burst into blue flames. She jumped him and clawed with speeds that would've made her look like blur. Y/n was able to keep up with al her strikes. "Flame Breathing: First form: Unknowing Fire!" He slashed at her cutting her head off
The demon's body denigrated as she stared at Y/n in wide eyed shock. "What why? I loved you!"
Y/n sheathed his sword "well isn't that nice of you."
Y/n walked to the nearest inn as the fog dissipated. He walked in to see an old lady working the reception. "Young man! Where you just out in the fog? That's incredibly dangerous. Ever since the fog came at night young men have been going missing."
"Don't worry mam, I took care of the demon. Wait, a lot of young men went missing?"
"Yes."
"And so there are a lot young single women in this town?"
"That .....ummm..., that is correct."
Y/n stroked his chin "hhhmmmmm...... interesting."
Two days later Y/n was walking down a path next to a rice field. "That was a fun town." Suddenly he came across two demon slayer girls who looked to be about his age.
One had a red tint to her hair and wore a gakuran with black and green square patern and a large box strapped to her back. The other had sun colored hair and had gakuran of similar color. She was on her knees clutching a young man cloths who was trying to get her off.
"Please! Please! Please! Please marry me! I could die any day now, please! Marry me so I don't die alone!" she screamed.
"Well this ought to be fun," Y/n thought rolling his eyes.