A sense of attachment was all that he needed. When his heterochromia eyes laid upon her for the first time, He felt as if he was free from being imprisoned in the asylum. Then came those words that escaped her sweet lips. Where she promised she will set him free, to clear his name. And little did she know that she has a special place within his cold heart.

He was known to be reserved. And she was known to be the newest Upper Moon to ever exist in the era. Yet, she was so similar to him. He watched her often getting called upon by their Master. He watched her smile at something that he couldn't understand. That's when he realized, she had retained her human emotions. Unlike him, driven by a certain hatred within his demon soul. Yet, on the night he went out hunting together with her, watching the way she glowed beneath the moonlight. He felt a burning sensation within his cold heart, a feeling he found familiar but was long forgotten once. Was it love? He thought. Soon it turned into a competition, a constant need to see her every day. Getting irritated whenever the other Upper Moons were near her. He was known to be reserved, but oh well, he was known to be hot-headed when it comes to her.

She knew his thoughts and ways about finding the perfect life was wrong. She knew it the moment she was born into the world, born as a half-demon. The very thought of knowing his blood was flowing through her own body made her frustrated. She hated him. She was weak and useless in his eyes. Kibutsuji Muzan had wondered why did he allow this girl to be born in this world? Ah. He remembers, for he had fell in love with the girl's mother. Yet this girl was nothing like her mother. Her mother was obedient, and was willing to devote herself to him, yet she remained human. He couldn't be bothered that his so called daughter had decided to run away. Not like he could kill her right now, for she was not under his control. [name], wasn't given the privilege to obtain his last name. But she couldn't be bothered for she hated him to the every single cell that existed in his body. Running away was the best she could think of, until she bumped into Ubushiyaki Kagaya.

"As long as you are breathing, I'll come to you," Those words replayed in her head every day, and she could only hope for him to come save her. But as soon as tragedy falls upon his family, he abandoned her and his younger brother. She watched as he turned his back on her, yet something was tugging him back. It was more than just wishing she was alive. It was the fact that he was willing to sacrifice anything, just to ensure her safety. But little did he know, he was the one being saved.

Being a demon slayer, especially taking the position of a Wind Hashira. Shinazugawa Sanemi knew the dangers of him not being able to return home someday. Many wondered, how could someone who is gentle and kind like Akane [name], a helper in the Demon Slayer Corps, get together with someone as short-tempered and violent like Shinazugawa Sanemi? Many believed that she deserves way much better than the constant arguments she was having every day with the Wind Hashira. And one day, it ended. It ended with him comparing her to someone who she could never be. Kocho Kanae. But then, there was a hidden reason why he wanted to end things with her. For he was entirely devoted to protecting her at all costs, even if it means him losing his life as well.

He remembered the day he first saw her. She was breathtaking. He felt as if his worries were all gone. It was as if he was living in a peaceful world. Only for her to return home from a mission ; Hateful remarks were thrown at her, but he stood by her. For she was turned into a demon.

It all started with just a phone call. From a phone call to daily texting. Unknowingly to them, they were hooked to one another. Only to not know how they looked like. It was her voice that Shinazugawa Sanemi was mesmerized by. Followed by her kindness then, how she would always be there Despite them not seeing each other before.

Kimetsu University where the finest students graduate and go on to lead successful careers. Some find success. Some find riches. Others find lifelong friends. A circle of lovers just happens to find a sweet little lady that makes their hearts beat.

'When I wished for him to be healthy ... When I wished for us to be happy ... When I wished for us to have a life together ... I wasn't thinking of this.' The first demon Muzan created is the young woman he wanted to marry. Starting their new life together, the two of them set out to conquer the sun. But what will happen when their views of life and being demons change? Will Muzan kill his wife, or will something else pull them apart? MuzanxOC, written in the first person perspective. Sort of MuzanxReader.

Y/N was just an ordinary person from the 21st century, she didn't expect to wake up in an anime where human-eating demons roam free every night. Well, what's left for her is to learn how to use a sword and help the protagonist make his sister human again, who knows if she can get back to her world like this? Little did she know what was coming in this world that wasn't even hers. ❀⊱┄┄┄┄┄┄┄┄┄┄┄⊰❀ ❀ - STATUS : ONGOING ❀ - DEMON SLAYER BELONGS TO KOYOHARU GOTOGE ❀ - COVER ART DOES NOT BELONG TO ME ❀ - ON QUOTEV UNDER THE SAME NAME