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.

He was known to be a hot-blooded individual. Showing little to no concern about anything or anybody. Except towards the swords he creates with his burning passion. Many disliked him, finding him to be very difficult to approach. Given how hot-headed he was, yet the passion he had for swords made him stand out from most of the swordsmiths who made swords for the sake of it. He didn't need anything else. Nor did he need love. He just wanted to create swords after swords. Only to realize he had other feelings, for a particular Hashira. Then many started to question then, why would someone like her fall in love with someone as hot-tempered as him? And how?

She was bright, cheerful, kind. Patient and understanding. Those were the traits that got everybody loved about her. But little did they knew, the secret she harboured within herself. A long-lost friend of Kamado Tanjiro, only to catch him by surprise as he found out where she had disappeared to. She was often told that she was loved by many, and especially by the Water Hashira. Many trusted their lives within her hands as she dealt with every mission with caution. But little did they knew, [name] had to go against her morals and sacrifice her emotions. Only to have the Water Hashira, Tomioka Giyuu, along with her long-lost friend, Kamado Tanjiro, watched as she threw away herself for the sacrifices she was willing to make.

"If ever there is a time where I can meet you in a world where I'm healthy, I will be contented to love you instead," he whispered to himself. He tried to remember who he had said it to. Only to realize that the person had been with him the entire time. That's when he realized they knew each other from a long time ago. And she worked up an act of courage then to speak her mind. "Have we met before?"

"Don't worry, Rui. Nee-san will always be here with you, even if you cannot turn back into a human," He remembers her then. He remembers all the effort she has put into. He remembers the warmth of her back as she often carried him around the house. While she does the chores in a splendid manner, keeping it clean and free of dust. He remembers those words she would speak to him when putting him to sleep. He remembers being adopted into her family, only to bring great tragedy. Yet, she didn't blame him in any sort of way. Telling him that it was God's choice to take away her family. He remembers her effort in protecting himself back then, preventing him from getting killed. Trying her best to gain the trust and faith of all the demon slayers she has crossed path with. Only to become, the Shadow Hashira that vowed to return him to human.

"Trust is important because it is the basis around which all human relationships revolve. Without trust, there can be no relationship. Trust can come naturally or it can be manifested. But then again, it will be my decision to trust you," Those words lingered through his mind as Kamado Tanjiro, the hidden Upper Moon that was tasked by his supposedly only master, Kibutsuji Muzan, to assassinate the ever so calm Ubushiyaki Kagaya. Yet, nobody knew he was a demon. Until she found out.

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 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.

Iguro Obanai, the Serpent Pillar of the Demon Slayer Corps. Known for his bad temper, and his love for the Love Pillar, Kanroji Mitsuri. Yet, a particular girl with dark blue ocean eyes and long brown hair had caught his attention. He thinks about her every day and night, and would often drop by to see her. The way her lips would curl up into a smile when her dark blue ocean eyes laid upon his heterochromia ones. And to add on, she was the younger sister of the Shadow Hashira of the Demon Slayer Corps, Akane Haizaki. Yet, she was considered one of the most trusted member of the Demon Slayer Corps, allowed to attend the Pillar Meeting and understand the situation that was going on. Yet, the way her dark blue ocean eyes would widen in concern as she always runs to her older brother whenever he sustains injuries. And here Iguro Obanai had soon realized, who he truly loves. And he wants nothing more but bliss in this world filled with demons.

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.