Demon slayer in nutshell x reader

Part one

"Hey, my name's Y/N L/N, and I have super smell!" Y/N said as he was walking around the village with cole on his back, "Related fact: people in 1920's Japan did not wear a lot of deodorant" Y/N continued to say, "Can you smell that I ate your family?" Muzan pops up behind Y/N, staring at him, Y/N looks over at Micheal Jackson and smiles at him, "Actually, Yes!" Y/N said, happily.

"...unfortunately" Y/N said as he saw his family dead in his house.

"Oh, hey S/N. You're still alive!" Y/N said to his sister, but she was growling and looking down, "Uhh, can you help me dig some-" Y/N were cut off when S/N attacked him, "hoooOOOOOO GOD" Y/N screamed in panic.

"So my sister's a demon" Y/N said when he was with Sakonji, "But I think she's chilled out?" Y/N said and and pointed to the house near them where S/N were sleeping in.

"Put that bitch in a box, I'ma teach you how to kill demons!" Sakonji said as he turned to look at Y/N "Okay" Y/N said and got bitch slapped by Sakonji.

~six months later~

"Can I kill demons yet?" Y/N asked, after all the training he has done "Can you cut this rock?" Sakonji asked as he was standing in front of a big rock with a big rope around it, Y/N tried to cut it with his sword but it didn't work. "....no" He says, sad he couldn't kill demons yet, "Then you can't kill demons!!" Sakonji said as he walked away. "F*ck" Y/N said as he tried to cut the rock again and again, but still not working.

~six more months later~

"I give up" Y/N said, he was really tired and knew he could never cut it, "But don't though!" Sabito and Makomo said as they appeared behind him, "Okay!" Y/N said, he swung his sword one more time and this time the rock broke in the middle, "thanks ghost children!" Y/N says, happy he finally cut the rock.

"Alright biggie smalls. There's one last thing to do before you can kill demons" Sakonji said as Y/N was back at the house and was cutting his hair. "What's that?" Y/N asked curiously on what he has to do, "Kill demons" Sakonji says, his back turned to Y/N, "Okay!" Y/N says but he was scared.

~the final selection~

*screaming heard in the distance*

"Why would you send a child here?!" A random kid said as he was on the ground as he tried to run away from the demons, "Don't you adore the sound of dying children?" Kiriya said to his sister, "It's the only thing that gives me pleasure anymore, dear brother," Kanata said.

A demon was running to Y/N but he sliced it like it was cake, "Hiyah! I guess Sakonji trained me well" "Did you say Sakonji?" A big ugly demon with hands asked Y/N, "''cuz I keep eating his kids!, it's funny... you'd think he'd stop sending me kids. Y'know, considering I keep eating them, it's like DoorDash, but with children!!" The demon was just talking, not noticing Y/N running towards him, Y/N then cut the demon's head off, "what the hell?!"

"I could smell where to cut you!" Y/N said with a serious look. "That's f*cking stupid...!" The demon said as he turned to ashes, looks like Thanos has been here as well.

"All right. Here is your super special sword" Sakonji said as Y/N was getting his sword, he took it out from its case and held it up, watching it turn black, "It's black!" "Does the color mean anything?" Y/N asked, wondering why Sakonji was shocked.

"YUP!" Sakonji said and then stayed quiet as Y/N stared at him.

"..oh, s- th-that-that's-that's all you're gonna-" Y/N says, thinking he would say something to Y/N, but he was cut off by Sakonji. "Go do your Job!!" He yelled as Y/N went out.