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3rd person POV
He shifted his gaze towards her when he heard (Y/n) mutter and his eyes slightly widened. Tanjiro grabbed the hilt of his sword, ready to attack when a young voice stopped him.
"Daddy? Who's that?" Muzan turned to the side, in his arms, were a little girl with twin braids and hazel eyes. Tanjiro and (Y/n) gasped, she clasped a hand over her mouth and couldn't stop the pain that she felt in her chest when she saw him. 'Stop it! It's been a thousand years! Get over it!' She scolded herself and regained her composure.
"Tanjiro.. We can't fight him right now, there are people nearby!" She whispered to him, grabbing his hand that held his sword in an attempt to calm him down, though he wasn't listening, he was too shocked to do so. Muzan noticed their hands and glared at it for a second before looking at the two again and lightly smiling.
"Is there something I can do for you? You seem to be quite flustered."
He asked them, but before they could answer, a female's voice spoke up. "Oh my. What's going on?" "Mother!" Tanjiro felt like vomiting and held his stomach. 'They're humans!' He looked at the child and woman with a horrified expression.
(Y/n) did her best to keep her composure when she saw the woman. 'Damn you Muzan!' She inhaled deeply, her eyebrow twitching. 'It's been a thousand years since he disappeared, and your job is to kill him! Get a grip!'
"Do you know them?" The woman asked, looking at (Y/n) and Tanjiro. "No. Much to my consternation, I've never seen these two before." Muzan answered, his hand falling to his side and the other kept the young girl in his arm. "They must've mistaken me for someone else."
'Ah, so that's how it is.' (Y/n) gently pulled Tanjiro towards her, a smile plastered on her face. "Yes ma'am! I deeply apologize for bothering your time! My fiancè over here thought he's a friend of ours that we would be meeting here!" She lied and the woman softly smiled, not noticing Muzan glaring at Tanjiro who lightly blushed despite the situation and his hand quickly slashing at a man's neck that passed by.
(Y/n)'s eyes widened when she saw the same man that was slashed attacking his wife. "Stop!" Both Tanjiro and (Y/n) yelled, running towards the man who bit at his wife's shoulder, making it bleed out, staining her kimono and making her scream in pain.
Tanjiro removes the scarf that was on his head and shoved it in the demon's mouth after knocking him down, away from the poor woman who's being aided by (Y/n).
"Dear!" The woman yelled and (Y/n) hardly pressed down on her wound with a cloth, preventing her from turning into a demon. "Miss, please worry about yourself, he will be taken care of." She spoke to her and lightly smiled, easing the woman's nerves ever so slightly.
Muzan watched them from afar and walked away with the woman and child. Tanjiro cursed under his breath as he got further and further away. "Muzan Kibutsuji! I'm not letting you get away! No matter where you go! I'll follow you to the ends of Hell, and I swear I'll slice off your head with my blade! I'll never forgive you no matter what!"
(Y/n) already finished aiding the woman and helped Tanjiro take care of the demon. "Tanjiro! We'll deal with him later on, but not now! There's alot of people nearby!" She scolded, he looked at the pinned down demon with a frown and heard footsteps rushing towards them. "What the hell are you doing?" 'Crap! It's the police!' (Y/n) thought and they kept trying to pry Tanjiro off of the man.
"No! We'll deal with him! Back off!" She yelled, pushing them away from him but they kept on trying to pry him off. Before one of them could strike the two with a bat, (or wooden stick idk- it could maybe be a broom lmao) flowers surrounded them, blinding the guards that was pestering them.
(Y/n) gasped and turned to the side, seeing two figures approaching them. It was a boy with green hair and the lady had pretty purple eyes. "You two are..." (Y/n) muttered and they nodded. They helped them get away from the police and they were thankful for it.
[Time Skip]
"Ahh, that was tiring..." (Y/n) uttered from beside Tanjiro who sat next to his sister on the bench, Nezuko. "Oi, you two!" They flinched at the upset voice of the bald man.
"How dare you waste my udon! And you, you didn't even finish it and left it! Now it's cold!" The two sweatdropped and in the end, they ordered 3 bowls of udon. 2 for Tanjiro, and 1 for (Y/n). They quickly finished their bowls and thanked him for the meal.
They saw a figure nearby and recognized it as the green headed boy from earlier. (Y/n) turned to Tanjiro with a sad smile on her face. "Well, this is when we depart, Tanjiro. Be safe on your way, alright?" She patted his head and walked away, waving at them before looking at where she's headed.
'Muzan... Just what the hell has gotten into you...'
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✿𝔸 𝕋𝕙𝕠𝕦𝕤𝕒𝕟𝕕 𝕐𝕖𝕒𝕣𝕤✿ (Muzan x F!Reader) [COMPLETED✔]
Fanfiction(THIS IS OLD AND ONE OF MY FIRST FFS SO BEWARE AND READ AT YOUR OWN RISK LMAO 💀✌) (Y/n) (L/n), Muzan Kibutsuji's fiancèe before falling ill and turning into a demon. She was patient unlike him, so she was able to be fully cured by the doctor with t...